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Hubble Space Telescope: 20 Years of Awesome Science

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On April 22, NASA announced 20 years of Hubble Space Telescope pictures. Yes, our little buddy Hubble has been up there for 20 years, happily sending images back to us. NASA has collected videos, a Greatest Hits photo archive, and even a book showing Hubble's best work. Here's my favorite Hubble photo:

Orion Nebula

Check out HubbleSite for much, much more. (Be sure to check out their computer wallpaper section and their gallery of Hubble images -- that's a lot of images.)

After the jump, a few more awesome Hubble pics....

Hubble Captures Spectacular "Landscape" in the Carina Nebula

Southern Crab Nebula He2-104

Helix Nebula (Closeup)

Comet P/Shoemaker-Levy 9 Bombards Jupiter

The Orion Nebula's Trapezium Cluster

Hubble Mini-Documentary

There's a NASA-tastic video celebrating the 20 year anniversary through a series of interviews with scientists. Unfortunately NASA's video embedding code doesn't work very well, so I can't include the video in this post directly. Check out the video here for an overview of what Hubble has done for scientists over 20 years, including specifics of why Hubble is important, and what makes it different from ground telescopes.

Share Your Favorites!

The best Hubble gallery I've found so far is this HubbleSite album. Got a favorite Hubble pic? Post a link in the comments!

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science
Belly Flop Physics 101: The Science Behind the Sting
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iStock

Belly flops are the least-dignified—yet most painful—way of making a serious splash at the pool. Rarely do they result in serious physical injury, but if you’re wondering why an elegant swan dive feels better for your body than falling stomach-first into the water, you can learn the laws of physics that turn your soft torso a tender pink by watching the SciShow’s video below.

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What's the Saltiest Water in the World?
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iStock // lucamato

Saltwater is common around the world—indeed, salty oceans cover more than two-thirds of the globe. Typical saltwater found in our oceans is about 3.5% salt by weight. But in some areas, we find naturally occurring saltwater that's far saltier. The saltiest water yet discovered is more than 12 times saltier than typical seawater.

Gaet’ale is a pond in Ethiopia which currently holds the record as the most saline water body on Earth. The water in that pond is 43.3% dissolved solids by weight—most of that being salt. This kind of water is called hypersaline for its extreme salt concentration.

In the video below, Professor Martyn Poliakoff explains this natural phenomenon—why it's so salty, how the temperature of the pond affects its salinity, and even why this particular saltwater has a yellow tint. Enjoy:

For the paper Poliakoff describes, check out this abstract.

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