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Incredible Deep-Sea Creatures

Although the presentation was given ten years ago (the presenters start by cracking jokes about the then-current box office hit Titanic), ocean explorer David Gallo has some amazing video of animals and other interesting stuff in the deep sea. The thirteen-minute presentation is crammed full of video showing strange octopods, colorful jellyfish, beautiful tubeworms (including a worm fight!), and scary fish -- but there's also some really interesting video of deep-sea hydrothermal vents. The vents are surprisingly active, showing clouds of sulfurous volcanic crud pouring out. Despite this seemingly toxic environment, there's a thriving ecosystem surrounding the vents -- and Gallo has video to prove it.

If you've ever wondered what's down there, check out this video!

(Note: most of this video seems to have been taken by the Jason ROV that was made famous by Bob Ballard's Titanic investigation. (Well, okay, Ballard used Jason Jr., a prototype of Jason, but it was pretty much the same thing.)

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Ian Hitchcock/Getty Images
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Space
Can’t See the Eclipse in Person? Watch NASA’s 360° Live Stream
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Ian Hitchcock/Getty Images

Depending on where you live, the historic eclipse on August 21 might not look all that impressive from your vantage point. You may be far away from the path of totality, or stuck with heartbreakingly cloudy weather. Maybe you forgot to get your eclipse glasses before they sold out, or can't get away from your desk in the middle of the day.

But fear not. NASA has you covered. The space agency is live streaming a spectacular 4K-resolution 360° live video of the celestial phenomenon on Facebook. The livestream started at 12 p.m. Eastern Time and includes commentary from NASA experts based in South Carolina. It will run until about 4:15 ET.

You can watch it below, on NASA's Facebook page, or on the Facebook video app.

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iStock
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science
What Makes a 'Moon'? (The Answer Is More Complicated Than You'd Think)
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iStock

Not all moons look like the spherical glowing orb that hovers above Earth. In fact, to be a moon, a space rock technically only has to be the natural satellite of a star’s satellite.

That said, these rocks don’t all look, or act, alike. They come in a variety of shapes, sizes, and types, and they all have unique behaviors. For example, Jupiter has 53 known moons—including the solar system’s largest moon, Ganymede—and many of them have elliptical, backwards orbits. Meanwhile, Mars has two moons, and they're irregularly-shaped, dark satellites that orbit the planet’s equator in circles.

Since there are hundreds of moons—and even more conditional ones—in our solar system, this raises a question: Should we deem each and every one of these secondary satellites a “moon”? And if not, should the distinguishing criteria include factors like orbit, size, shape, or visibility from a planet’s surface?

MinuteEarth’s Kate Yoshida explores these questions in the video below.

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