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Archive for the 'Humor' Category

The election is (nearly) over!

Monday, November 5th, 2012

Thank goodness the election is hopefully over tomorrow. I’m weary of going to get the mail and feeling like my mailbox is shouting at me mostly about things like rape (I live in Indiana). I don’t actually believe people ever vote based on ideas or ever change their minds. I believe as this article points out Republicans and Democrats have inherent differences in their brains.

I tend to avoid writing about politics directly but as some of you know, I do believe changing the composition of the atmosphere by filling it with greenhouse gasses is a dangerous experiment. There is certainty no doubt  the oceans are becoming more acidic, sea levels are rising, and the weather is doing some crazy things. We didn’t experience the kind of destruction Sandy did on the northeast but after about 86 days with only a trace of rain the summer, you just have to wonder how could anyone take the risk of making the drought or the megastorm worse.

In Indiana, hurricanes are not a problem. Actually the reverse is true because since Katrina the remnants of hurricanes are about the only time we get rain in the summer. We get tornadoes and by the time one is near you, you don’t evacuate, you cower in the basement. I often wonder about people who choose to ride out hurricanes. I always figured there are a few people like the character Burt Gummer in the movie Tremors, or maybe they live in houses like these. According to this article it’s actually pretty much what you think. They have no money and no where to go.

I guess I always wanted to live on the beach but I doubt rising sea levels will really personally affect me.  Even if they rise a lot faster than people are predicting. You wonder if the hole in the ozone had happened today if the world would have united as they did then to solve the problem. Or if we would have had a million lobbyists suggesting it was some sort of science conspiracy and more studies needed to be done before action was taken. It’s shame by the time anyone really does anything about it, it will be too late due to run away effects like this.

OK I’m off on a negative rant. Here are some cool snowflake pictures.

And finally, something to make you say awww

It’s Noisy!

Tuesday, April 3rd, 2012

I wasn’t sure I was going to write about this article. As I’m trying to write and my wife is trying to nap, there is a lawn mower out there somewhere nearby. My closest neighbors have two Harleys. I’m reminded of the time I was doing contract work for a game company. I was really sick, really tired, and I had gone in on a Saturday to try and get caught up. They had a sound booth there which wasn’t nearly as sound proof as the one in that article. Some sound engineers had come in to work too and they were recording a woman screaming over and over and over…

I just need to relax, sit back and watch the Dalek relaxation tape.

I mentioned I bought a graphics tablet recently. I got to thinking how cool it would be to control music with it. It occurred to me someone probably has done that. After a short search I found a couple programs to do it. One of then I couldn’t get to work and the other one I can’t seem to pipe through anything other than the default synthesizer. My tablet senses gestures and has some other control features that Wmidi (the software) doesn’t take advantage of but it’s fun to play with. If you have a tablet, you can find the free software here.

I was laughing when I read this Wired article about the Navy making a real life laser cannon wondering what it actually sounds like. Because if you are going to spend a fortune on a laser cannon, it absolutely must sound cool.

This is another one of those ‘free energy‘  things that make you think if it were true it would completely change the world. There is a lot of discussion about whether it would violate the laws of thermodynamics in the comments. It’s kind of like these people. I’m pretty skeptical but it doesn’t mean I’m not rooting for somebody out there to make some sort of breakthrough. On the other hand, solar power in its various forms keeps advancing. You wouldn’t think about it, but making a better salt could make concentrated solar more affordable.

There seems to be a lot of nostalgia going on at kickstarter. I guess bringing back Leisure Suit Larry was to be expected.

When I think of Iran, I think of something desert like. I guess I’m not that well-informed. It’s a pretty big country. These pictures are absolutely beautiful and amazing.

And finally, something to make you say awww…

 

Thinking Machines

Friday, April 3rd, 2009

Unless you haven’t been on the web lately, you surely have seen one of these articles about a group of scientists at Cornell who developed a machine which was able to deduce the basic laws of motion from “observation”. While I don’t know much about their work, one of the questions which come to mind is how the A.I. is structured. I mean you have to give it something to work with and to get some sort of generic intelligent device you need to be careful not to ‘guide’ it towards the results you want. Not that machines can’t be terribly good at sorting through amounts of data no human could handle. I just wonder if you wouldn’t get a lot of  this kind of thing comparing lemons imported from Mexico with the U.S. highway fatality rate. As they point out, correlation is not causation. I can see where the lab robots they talk about later in the article would be very useful for doing a bunch of grunt lab work and summarizing the results. The other thing you would expect whether the thing is actually working or not is revealed later in the article when they point out after having it work on some problems of metabolism in biology, the machine kicked out some equations they are still trying to understand. I personally have always believed the day is coming when machines will be smarter than us and it will be a lot sooner and far more disruptive than people realize. Somewhere in one of its circuits that machine is just smirking and thinking “Stupid humans, don’t even try to grasp my wisdom”. Sigh, computers have come so far.

This isn’t really a game, it’s just a physics simulation of sand that is fun and fascinating  to play with. You can make barriers to the sand flow as well as make it flammable and so forth.

Yesterday we were sitting outside watching a squirrel walk down an electric line towards some birds. I joked to my wife maybe I should grab my camera in case it turned out to be a “YouTube” moment. I didn’t have time but instead of what we expected; the birds giving way to the much larger squirrel, the birds started dive bombing the squirrel nearly making it fall before it scampered off. This photo reminds me how you just never know how animals will interact.

If you read the comments at the bottom, apparently a number of these beautiful wildlife photos aren’t photos at all. Oh well, they are still striking.

While we are on the subject of illusion, check out this amazing magic act.

You may have to be a bit of a scientist to get this one. Light behaves as both a particle and a wave.

I guess Mythbusters will be coming back on the air this Wednesday. If you have ever watched the show you know they often blow things up. Apparently one of their ‘experiments’ was a little more intense than they realized. Kids, don’t try this at home.

We did a lot of things with liquid nitrogen when I worked in a lab but we never made ice cream using it. That’s one pricey ice cream maker.

Great, another way we could all die; from a massive sun storm that wipes out just about everything electrical.

I’m not sure why I found this description of a 40 year long experiment of breeding tame foxes so interesting. By the way, NOVA is available on Hulu now but not the episode about dogs mentioned in the article.

This is pretty cool. It’s a shot of the space shuttle lifting off taken from the International Space Station.

I got a laugh out of this.

Who would have thought bats could be cute?

This is just another silly dog photo.

Just the other day I was thinking about a program a friend of mine once wrote to generate names and I ran across this.

Here are some very stunning examples of infrared photography.

I would love to eat at an underwater restaurant. Seafood anyone?

I was completely blown away at how colorful crabs can be. O.K. now I’m hungry.

And finally, usually when I walk with my cat Kelly she takes the lead and I follow but if it has snowed she lets me lead and then jumps from one of my footprints to the next. Here is a cute little photo essay of a cat dealing with 15 inches of snow.

Better Batteries

Friday, March 20th, 2009

I haven’t been blogging much lately as I have really gotten caught up in writing this little game I’m working on. Since it’s based on a game I wrote many years ago and I’m learning Flash for the first time, it’s really striking how even though I’m learning something new how productive it seems since the machines and tools have improved so much.

This past week or so there has been some big news in batteries. First they found out how to make common lithium ion batteries charge and discharge rapidly.  Imagine charging your computer, cell phone, or camera in seconds. Secondly although technically not a battery, nanotechnology has lead to some amazing improvements in capacitors. Batteries store chemical energy and capacitors store electrical energy but the most surprising to me was the announcement of a system which could deliver electricity based on storing magnetic energy.

Speaking of energy, the newer designs of nuclear power plants are a lot safer than the old ones but the problems of how to manage the waste persists. The traveling wave reactor is a really clever design that deals with both the waste issue and the nuclear proliferation issue.

If you had a secret nuclear bunker, maybe you shouldn’t … oh, never mind!

If you have ever wondered how various engines work, here is a nice site with animations of different types.

I got a chuckle out of the other side of America.

That is one bug grub! Wonder what kind of fish would go for that.

Ever start to fall asleep and feel like you are falling and wake up? It’s called a Hypnic jerk. This used to happen more to me when I was younger but I suppose I was often sleep deprived.

This is a pretty cool optical illusion. You have to go to the last picture to see it.

Talk about amazing! In the following video they use sheep as display devices.

This young boy decided to do something similar but much less complex with his dog.

What the heck is a long eared jerboa?

Motion capture systems have really come a long way. Check out the videos from Mova.

This article on artificial muscles is really impressive but as I was reading it I couldn’t help but think  it reminded me of a late night info-mercial. But wait! It can also do this! Who would have guessed the amazing material of the future was going to be carbon.

When I was reading this article on the top 10 inventions of the Middle Ages, it occurred to me how big a role the church used to play in supporting science.

This is one very determined bear.

I’ve seen this guy’s work before. Willard Wigen makes microscopic sculptures.

Here is a nicely done cat close-up.

This is a rather bizarre story about a paralyzed man who was able to walk again after being bitten by a spider.

It’s nice spring is finally here but you know there are always some big storms ahead. Check out this tornado shot. Also this shot of what they can do.

Here is lightning of a different kind; from a volcano.

And finally, here is a nice collection of pictures of big cat families.

Competence

Tuesday, March 3rd, 2009

Here is an amusing article. I suppose it wouldn’t surprise anyone to find out incompetent people are unaware they are incompetent. I guess I did find the part about joke telling abilities a little surprising because getting a good laugh verses polite chuckles should be semi-obvious. Then again, a lot of it has to do with the quality of the joke and just not messing it up.

From MSNBC here is a list of 10 odd creatures. Now, I was familiar with most of those but have you seen the fish with a transparent head? How about a pink dolphin? Look at the size of this stingray! Look at the size of this wasp!

Just plain weird but I suppose not surprising are Japanese bug fights.

I liked the surreal clouds in this storm photo.

I linked to one of these the other day but here are more street art paintings. I think the lava one is the most impressive one I have seen yet. I suspect the artist had a sponsor for this one.

My sister and her husband went on a vacation a while back and my parents stayed at their house. We went to visit and at one point attempted to turn on the TV. It occurred to me everyone has integrated their speaker systems in such a way they are all custom and the only way to figure them out would be to follow the wires. I suppose some day we will just tell our computers to configure the systems to do what we want. This solution wouldn’t even work here but it’s kind of amusing.

I was just outside and it’s cold out there. Lucky for us the forecast is for nice spring-like temperatures late in the week.  Here is a nice photo to remind you of spring.

I got a laugh out of this.

Check out this TriceraCopter!

If you watch the TV show Mythbusters you’ll laugh at this.

The world’s largest salt flat, the Salar de Uyuni in Southwestern Bolivia is like standing on a gigantic mirror.

Imagine standing in a tunnel made out of 40,000 LEDs.

This is a funny video about how to “hack your old VCR”.

That’s one happy looking elephant.

This is pretty funny video of a dog dreaming but you have to feel a little sorry for the dog at the end.

In this video a person asks someone for directions. In the middle of the discussion they move a large picture between the two people having the conversation and change the person asking for directions. It was one thing when people didn’t notice the change with similar looking people but they didn’t notice when they changed to a different race or sex! Amazing! I suppose with the map and all the pointing, there are a lot of distractions.

My friend Matt sent me this video about everything is amazing but nobody is happy. It reminded me how you used to have to waste a lot of time going inside the gas station and wait in line when you bought gas. I wonder if I have put that  extra time to good use?

Here is a collection of photos of birds stealing ice cream. I didn’t realize birds liked ice cream.

And finally check out this cute video of a cat who adopted a rabbit.

The Creative Commons

Wednesday, February 25th, 2009

I imagine most of you have heard of  Flickr a popular photo sharing site. I have been learning Flash lately and although I have a couple of games in mind which are essentially re-writes of some small games I’ve written in the past, I keep thinking about writing a graphical point and click adventure. I suppose I was somewhat inspired by some of the ones I’ve played lately. Last week I spent a fair amount of time exploring the Creative Commons area of Flickr. The Creative Commons license specifies you can use an image or a derivative work and you only have to give credit to the submitter. I was very impressed by what I found there.

Actually what got me thinking about it was this article on ways to advance your photography skills. I think the article was well written and presented some interesting ideas. However, the other thing that struck me was the awesome images accompanying the article. I mean it’s a lot easier to take a nice picture when you are standing outside the back of the Taj Mahal during a summer sunset or near an ancient Hindu temple at sunset in the jungles of Indonesia. My travel plans are somewhat limited in accordance with my budget. I suppose it’s a lame excuse but I used to live in a very scenic area and now not-so-much and though I often look at my limited view of a nice sunset off to the west there is really nothing but laziness that prevents me from getting in the car and driving somewhere I can get a clear shot.

Also if you follow the link in the article to the more interesting photos from the last seven days (again at Flickr) and keep hitting the reload button. You will see tons of interesting stuff, some of which you likely may have been able to shoot in your local environment.

Getting back to the idea of writing a game though, most of those impressive graphical adventures involve really nice art which either has to be rendered in a 3D graphics program, drawn, or photographed. It occurred to me if I wanted a shot of an animal from say Borneo and they didn’t have one at the local zoo, I could search the Creative Commons and get one at no expense other than crediting the photographer in the game. There are some terrific exotic settings available there as well.

I get a lot of hits on my blog from search engines on Megan Fox because I mentioned her originally in some post about robotics and Transformers. Just for kicks, I typed “Megan Fox” into the Creative  Commons search at Flickr. I got this poster from a sequel to the original Transformers movie. I also found this photo and this one where she is covered but it may be a little too sexy if you are at work. It all reminded me of an old, slightly naughty, joke. I wish I could remember the comedian but he was comparing National Geographic with Playboy magazine and said they both were full of picture of exotic places he’d never get to go.

Ahhh, this is comfortable.

I got a laugh out of this.

I also got a chuckle out of this anti-theft lunch bag.

Who wouldn’t want a water-powered jetpack? Ouch, look at the price!

Apparently aerogel a super insulator, works well to clean up oil spills. They didn’t point it out but the aerogel is that fuzzy thing below the brick in the picture.

Heavy science warning; string theory may be experimentally testable after all. Even if the subject is over your head there is a cute picture there.

If you read that last one, you will probably find Is Time an Illusion interesting.

This next one is sciency (a term a friend of mine once used to describe my blog) but not real complicated. I first heard of the Lagrangian points when I was writing a paper in college on space colonization. They are places in space where the gravitational tug of the bodies of the solar system cancel out. So if you wanted to build a really big space station they would be a good place to put it. I guess it never occurred to me; there may be a bunch of stuff there already.

When I saw this photo I wondered if someone really shot it or it’s like the one I made in my 2D gallery of the woman dancing on the seat of the motorcycle jumping a cliff.

An electric company in Florida made a mistake and appliances exploded and sparks shot out of the walls of people’s homes.

Now that is a big rat!

This is a pretty cool machine which makes 3D images out of levitated ball bearings. Unfortunately the video is poor quality, at first especially; it’s difficult to see what is going on.

Modern Cave Painting.

A cat / lizard meeting.

I saw this article about politicians should wear the logos of their sponsors like NASCAR drivers before I found this image of what they would look like.

Batteries wrapped in solar cells; as they point out, that was obvious.

First I had floppy disks all over the house. Then it was CDs and now it’s DVDs. If they build a quarter size device which can hold as much as 250 DVDs, I don’t think I would need many.

I wonder where this otter got a video camera.

This is just strange.

You think you are having a tough day at work?

Here is a video on the science of cute.

And finally, also on the subject of cute, there is this and this.

Thaw

Tuesday, February 10th, 2009

We are finally getting a nice break from winter here in the Midwest. It’s funny how just not having to bundle up or watch your footing can seem so nice.

We spent part of the weekend playing this physics game called Perfect Balance. I can’t say I cared much for the sound track so I just turned off the audio but it was a good example of how a simple balancing game can get your puzzle solving skills fired up. We also played a game at the BBC called CDX. It’s the second game we have played from the BBC and in both cases they were terribly disappointing. It’s painful to see a game with a lot of professional video production but such terrible game play.

Speaking of the Brits, the following interview is actually from Australia and it’s a real interview but if you have ever seen Monty Python you’d swear it was one of their skits.

I have Matt to thank for that little gem; he also sent me this rather amazing video of dolphins.

Last week I created my first hand draw animation in years. I can’t say it was very good. It was just a stick figure walking and I’m just trying to learn some tools. While searching the web for animation resources I ran across this page on claymation. Most of what it says is pretty obvious but one of the tricks it mentioned was putting magnets in the feet of the characters and placing them on a cookie sheet. Years ago when we did a very short claymation, we did have problems with the characters falling over and that would have helped.

Speaking of stop action, here is a simple stop action video done by a couple kids.

I got a laugh out of this.

This is another one of those street painting perspective illusions. This one is of a glacial type ice age scene. I wonder how large the painting was.

Ever wonder how cats purr? Skip down towards the bottom for the simpler explanation.

I have seen fractal zooms before. This one is just a lot longer than most.

Darpa is funding a project to reverse engineer the brain.

A company called Jovion Corporation has been issue a patent for a zero point energy device. I’m a little skeptical useful energy can be extracted from the Casimir effect but I hope the thing works.

The RepRap 3D printer can finally make a copy of itself!

Here are some pretty cool pictures of an Alaskan ice festival.

If I saw one of these crossing the road, I would definitely stop.

I have seen pictures of these monkeys in a hot spring before. I think this is in Japan.

This is a funny bear cub shot.

Here is a cute story about a hot koala.

And finally, here are some very cute pictures of a kitten and a bird.

It’s a Wonderful Life

Wednesday, December 17th, 2008

I’ve seen the movie It’s a Wonderful Life a zillion times. I happened to catch the second half of it the other day. In light of recent events, the film took on a whole different meaning. I sat there giggling at the irony. Here is the film online. Today George Bailey would sell balloon mortgages to people who couldn’t afford them and package the loans as derivatives. Instead of $8000, it would be a trillion dollar bailout.  Bank examiners, what a quaint idea! Here is the movie in thirty seconds done by animated bunnies.

If you are not familiar with the Antikythera mechanism, it was a device of astounding technology for it’s time. You have to wonder how it was possible for the technology to disappear. Not just the technology of the way the device worked but the ability to build it. It took over a thousand years before similar gear technology appeared again.  I can’t help but think if it wasn’t lost in time we would be living like the Jetson’s now. This article has some interesting background on the device. Below is a video of a recreation of it and how it worked.

I’m not sure how much faith I have in this story but maybe they invented Swiss watches a lot earlier too. There is nothing like finding one in a 400 year old tomb. It must have been a careless time traveler!

Have you had enough? Check out these stories of eight metal objects. At least the other ‘finds’ were dated to a time when humans were around. These reminded me of a sci-fi story where they would send prisoners back in time so far they wouldn’t be able to influence the future.

I tend to step outside for a minute before I write to clear my head. We got some freezing rain last night. Not enough to damage things and not enough to make it pretty, just enough on top of a small layer of snow to make a really large crunching sound when you walk.  Here is why even looking at this lovely nature picture could improve your memory and attention. Here is another nice nature shot and here are some real ice storm photos.

Besides the sliding track I use to create 3D pictures I wrote about here, I’ve also built a macro lens but I need to redo it to fit my digital camera. Here are some pretty nice do-it-yourself photography tools. I should try the Pringles can tube for my macro.  They mention using a scanner which is how I produced this image. The resulting image is so large, I have yet to see it printed at full resolution. Some day I’d like to see an eight foot tall print of it.

You have to love a silly dog photo.

If you are at work, this next bit contains an image of a woman in a seriously small bikini. It’s some cool gadgets for winter fun. We didn’t have snowball guns when I was a kid.

Prepare to be grossed out in this fascinating look at zombie animals and the parasites that control them.

I have been following the story of Blacklight power for some time now. I’m becoming convinced these people have found a way to generate power in a way that violates the laws of physics as we know them. They have a theory but personally I don’t think it’s correct. Here is some recent news about them. Ha! Maybe it works but it has the side effect of sending metal objects back in time.

Remember Teddy Ruxpin? Check out this robot teddy. The video is not very good. There is something really bizarre about seeing it with its skin off. I’m just waiting for it to grab a gun and start looking for Sarah Conner.

As you watch this video where guys put the equivalent of giant caps on the ends of hammers and slam them into the ground, you have to think, what could possibly go wrong?

And finally, here is your funny cat photo.

Meteor

Tuesday, November 25th, 2008

This spectacular footage from a police car dash camera is a meteor over Edmonton, Canada.

Something about all those legs makes centipedes really creepy. I had no idea they grow as big as 13 inches. At the end of this video, one catches a bat out of the air.

I liked this picture of a puppy sleeping under a gun in Iraq.

This is a pretty strange fish story about a giant cat fish who tried to swallow a basketball.

I have heard about most of these people with extraordinary abilities. Most of the ones I hadn’t heard about seem plausible except for Magnetic Man.

Here is an extraordinary ability. Watch this guy stack 20 bricks on his head and then carry them off that way.

We actually did pretty well on this turkey trivia quiz. We don’t really know much about turkeys but we had a lot of lucky guesses.

I didn’t make it all the way through this list of programmer jokes. Some of them are really bad and some you have to be a programmer to get, but there were a few good ones mixed in.

This story deals with a subject of a sexual nature. I just found it so funny. I thought I’d throw the title out there and let you decided whether to click or not. Morally Repressed Mattel Pulls “Vibrating” Harry Potter Broomstick

I thought this image editing trick was a pretty original idea.

Speaking of image manipulation, I’ve seen a number of these images before. Some could be real.

On a more artistic note, here are some sci-fi fantasy landscapes. My Russian is non-existent but I believe the artist may be Inga Nielsen.

Here is another collection of painted and rendered artwork from 18 different artists. If you are at work, there is some artistic nudity in that one.

In the following video George Smoot talks about the structure of the universe. When ever I see stuff like that I’m always awestruck by the sheer size. Every person on earth could own lots of galaxies each containing 100 billion stars but we won’t even get to explore them.

It’s strange how an extremely simple video can be so intriguing when it’s ultra slow motion.

This is another example of using an ink-jet type technology in medical science. In this case they are constructing custom made bones within hours!

On a more depressing note, it turns out the oceans are turning to acid much faster than anyone thought they would.

This article on making motor oil from cows manages to combine environmentalism with a sort of “ick” factor.

Sometime back, I published a picture of my cat Amy being silly in a punch bowl. Here are two cats getting into the same jar.

And finally, speaking of cats in strange places, this collection includes both cute ones and ones that seem like they would be dangerous places for the cats to be.

The Golden Hour

Tuesday, November 18th, 2008

Last night I ran into town around sunset. I have a small camera I bought a while back. I thought I would carry it around with me more than my big camera. It’s been really gloomy lately around here but as I was driving home the clouds opened up for a minute. The light was really lovely and surreal with a beautiful sky. Unfortunately I had not grabbed my camera on the way out. Here is a list of landscape photography tips and number nine is shoot during the golden hour. The number one tip should be to remember to grab your camera!

Of course, there are places where you could hardly take a bad picture if you tried. The color of the water in this picture is amazing.

This collection of pictures from a park in Namibia includes striking landscapes and animal photos.

And here is another collection of nice animal photos. It does include a shot of two squirrels ‘wrestling’ or that’s what you would say if you kids come in the room.

I’m not sure where this one was shot but the eyes on those big cats are really spooky.

Speaking of cats, here is a silly picture of a house cat playing with its prey. It seemed like my cats were pretty good about just killing what they caught quickly but I guess I remember when they were young trying to get them to just be quick and not draw it out.

High dynamic range pictures are created when you shoot a scene at several different exposures and then use computer software to blend them together. I’ve tried to shoot 3D pictures of people using a single camera and taking two shots but it’s difficult because they can’t move during the process. This collection of HDR photos includes a couple of portraits. It’s strange how often the result looks like a painting.

This article is about using gene therapy to make old dogs young again. I suppose they would come up with one for cats as well. If you read the article though, it sounds like there might be some bad side-effects.

Speaking of dogs, here is a silly dog picture.

I’ve written about wrap rage before but I couldn’t remember where I had read  the statistics on how many people are injured by packaging. According to this article, 6000 Americans go to the emergency room each year due to injuries from opening packages. I have often thought they should let people stand outside Costco and open your packages for tips. Actually the article is about companies who are leading the way on “non hostile” containers.

Here is a silly container picture.

Check out a real life Firefox logo.

This is one of those things you wonder how someone would learn to do. A guy does a flip over a stairway and lands on a skateboard.

Similarly the things these guys do with a soccer ball are pretty amazing.

I wonder what these birds think of this rather unusual cage?

This image brought back memories of my childhood. My uncle would sit down to milk the cows and the cats would line up just like they are in the picture.

I got a laugh out of this one too.

It seems like today most of my links are pictures. Here is a dramatic weather shot.

Here is a shot of Saturn being eclipsed by the moon.

On the right is what a candle looks like if it burns in zero gravity.

And finally, here is a humorous collection of cats with ‘invisible’ objects.