A frozen waterfall.

Time is precious.

“Spacewalks are fun — period.” Start your weekend on top of the world as Kate Rubins of @NASA_Astronauts & Soichi Noguchi of @JAXA_en venture into space to conduct upgrades on the @Space_Station. Tune in tomorrow at 5:30am ET to watch the mission at: https://t.co/mzKW5uV4hS

Incredible lightning storm over Western Australia captured in timelapse by Geoff Green.

The sky lit up last night in North Dakota. Here's a short reel of timelapse and realtime video of the aurora (10pm-12am CDT; 3/2/21). #aurora #northernlights @TamithaSkov @LachDonna @dmaluk1 @TweetAurora #astrophotography @LiveAuroraNetw1 @KimHinesSN

Milky way above the Monument Valley,USA😍

In Brazil, this couple planted 2 million trees in 20 years to recreate a forest❤🌳

This week I’ve been doing lots of health checkouts, getting ready to get to work. I’ve checked many tasks off my list, including instrument tests, imaging, and getting my arm moving. Warming up for a marathon of science.

This Owl’s alignment with the frame

To date, 65 women have flown in space, and many of them have advanced @ISS_Research aboard the @Space_Station since 2001. This #WomensHistoryMonth, learn about notable women who contribute to science that benefits humanity on Earth – and beyond: https://t.co/4YIXATEoJU

Amazing skydiving without parachute world record

March is the most geomagnetically active month of the year. Why? It's the Russell-McPherron Effect. During weeks around equinoxes, the sun's magnetic field can link up with Earth's, creating a portal for energetic particles. #Aurora over Norway 🇳🇴 by ZWerger-Schoner #Weather

Mount Etna (Sicily) eruption yesterday’s morning Credit video by PierPan

4 billion years from now, our galaxy, the Milky Way, will collide with our large spiraled neighbour Andromeda. Here's an animation of what it'll look like. Credit NASA

Pythagorean Theorem Demonstrated with Fluids. https://t.co/1DN9gHXvmp

Here's how NASA makes sure its spacesuits are safe https://t.co/roy4wGBQ5y

Physics Fun

Amazing Skills