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YouTube // NASA Johnson
YouTube // NASA Johnson

Watch Ultra HD Video of a Colorful Water Blob in Space

YouTube // NASA Johnson
YouTube // NASA Johnson

If I had a chance to visit the International Space Station, there are lots of things I'd like to try, but high on the list is "goofing off in microgravity." When they're not performing actual science, the astronauts and cosmonauts on the ISS seem to feel the same.

On the ISS right now is a RED 4K camera, which shoots "Ultra HD" video, including slow-motion. In the video below, the crew put dye in a blob of water (because colors are beautiful), then added effervescent dissolving tablets (because bubbles are cool, and cause the sphere to deform in interesting ways). Yeah, it's basically goofing around. But it's goofing around in space, using cool gadgets!

NASA described the footage like so:

Astronauts on the International Space Station dissolved an effervescent tablet in a floating ball of water, and captured images using a camera capable of recording four times the resolution of normal high-definition cameras. The higher resolution images and higher frame rate videos can reveal more information when used on science investigations, giving researchers a valuable new tool aboard the space station. This footage is one of the first of its kind. The cameras are being evaluated for capturing science data and vehicle operations.

In any case, hit that 4K button (gear icon in the lower right of the player, on a desktop browser, choose the maximum size), go fullscreen, and behold our new blobby overlords! My favorite bit is watching the bubbles burst and fling tiny mini-blobs of water out of the mega-blob.

Also, because NASA is a government agency, you can download the gigantic RED 4K source file if you like.

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Watch Fireworks Explode Underwater at 120,000 Frames Per Second

Fireworks are meant to be viewed on dry land, which explains why the underwater detonation of an M1000 in the video above amounts to nothing more than a pathetic pop. At least that’s what it looks like in real time. The Slow Mo Guys decided to up the entertainment factor significantly by filming the 0.01004-second process at 120,000 frames per second. The result is an explosion that expands into a glittering ball of light before imploding like a dying star. It should go without saying that setting off explosives in a fish tank shouldn't be tried at home—Dan and Gavin have plenty of experience handling dangerous situations.

[h/t Nerdist]

All images: The Slow Mo Guys/YouTube

Know of something you think we should cover? Email us at tips@mentalfloss.com.

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Watch Rapidly Cooled Glass Explode in Super Slow Motion

Gavin and Dan, a.k.a. The Slow Mo Guys, are back with another video that marries destruction with education in the most entertaining way, this time with Pyrex glass measuring cups as the star attraction. Armed with a camera that films at 28,000 frames per second at its starting point, the experimenters decided to see what would happen when very hot glass is rapidly cooled by ice water. As the guys note, there are labels that specifically urge caution against such scenarios, which is why you should absolutely not try this at home.

As you can see in the video, the guys shatter cup after cup while increasing the frame rate each time until they reach an incredibly slow 343,915 frames per second. According to the duo, the reason for the cool and totally dangerous effect is something called thermal shock. When some objects (like glass) experience sudden temperature changes, the two opposing forces can result in more stress than the material can handle. As Dan explains: "The heat wants to expand the glass, and the sudden cold wants to contract it, and the glass just gives up."

In the end, five seconds of real-time time action produced over 19 hours of footage, which you can watch in its entirety on Gavin and Dan's other YouTube channel. 

[h/t YouTube]

Banner image: YouTube

Know of something you think we should cover? Email us at tips@mentalfloss.com.

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