A clip of filmmaker Maarten Koopman’s Under My Hat. Watch more of his animation here: Famous Paintings and Sketchbook Machines.

Canadian astronaut Commander Chris Hadfield has made it a part of his five month mission to educate about space, science and the International Space Station through a series of videos about daily life in space. In this one, he shows us how astronauts sleep on the ISS.

In case you’ve missed any of his fascinating reports, he’s also shown us how to wash our hands, brush our teeth, how we use math in space, how microgravity effects the body — how eyesight is affected and how food tastes — as well as what it’s like to cry in space: 

Be sure to watch all of Commander Hadfield’s Expedition 34/35 videos.

Life’s daily little details get interesting when you live in microgravity. For example, how do astronauts wash their hands in space? ISS Commander and Canadian astronaut Chris Hadfield demonstrates how. Hint: It involves grabbing a floating ball of liquid!

If you liked this, you’ll definitely want to go on a tour of the international space station with Commander Sunita Williams! Commander Hadfield has also demonstrated how astronauts clip their nails in space and what mixed nuts look like in space. Follow @Cmdr_Hadfield on Twitter.

Dr. Roy Lowry of Plymouth University in the UK made science explosively exciting for his class by demonstrating how powerful (and loud) it can be when the pressure of cold, trapped Liquid Nitrogen, a liquified gas, is warmed in a bucket of water. Then he added 1500 Ping Pong Balls.

If that didn’t make sense, watch. He’ll explain it all. And then when you see him pour the balls in and run away (it’s dangerous!), cover your ears or turn down the volume, and let the science commence!

(Updated video link.)

Thanks, @bneller and @mamagotcha.

From Argonne Labs comes this intriguing video demonstrating the acoustic levitation of liquids on a piece of equipment developed for NASA to simulate microgravity conditions.

“The acoustic levitator uses two small speakers to generate sound waves at frequencies slightly above the audible range – roughly 22 kilohertz. When the top and bottom speakers are precisely aligned, they create two sets of sound waves that perfectly interfere with each other, setting up a phenomenon known as a standing wave.

At certain points along a standing wave, known as nodes, there is no net transfer of energy at all. Because the acoustic pressure from the sound waves is sufficient to cancel the effect of gravity, light objects are able to levitate when placed at the nodes.”

From Scientific American, via It’s Okay to Be Smart.