For a fun conversation between @matt_of_earth and @neiltyson, check out @StarTalkRadio's latest episode! We go from black hole entropy all the way to the solar gravitational lens telescope

Join @matt_of_earth as he chats with @TOEwithCurt about our quest for a theory of everything, the nature of reality, and obv the obligatory free will question!

Question time has started for Matt's Reddit AMA. Answers will begin in a little bit, but now's the best time to ask yours (& upvote pls!)

Every answer in physics generates more questions. Time to contribute to the exponential growth of questions by trying to answer a few! Please join me for TWO AMAs - today (12/19, 4pm EST) on and tomorrow (12/20) on

If you can see the lunar eclipse right now, you're watching all sunrises and sunsets across the world, reflected back to us by the moon. (Images from NASA/GSFC)

RT @BaharGholipour: The quantum uncertainty we experience at @PBSSpaceTime : Will the cat ruin or not ruin the take?

Arecibo helped form so much of our modern understanding of the universe. It will be missed, but the knowledge it gave us will last forever. We were lucky enough to visit last year. We made this VR 180 tour so you can still explore its dizzying glory

In case you missed it: @matt_of_earth and @DrBrianKeating are bringing together leading physicists to discuss our long quest for the deepest layers of reality. Part 1 of 2 tomorrow! (July 28 4pm EDT) with @lirarandall, @stephstem, @tegmark, @jbbeacham.

This was such a fun conversation with @rezaaslan and @rainnwilson. Check it out!.

Fighting quantum weirdness with quantum weirdness. Quantum cryptography may be our only defence against the encryption-cracking threat of quantum computers

Second interstellar rock possibly discovered by Amir Siraj and Avi Loeb in @NASA's CNEOS catalog of past meteors. It vaporized in our atmosphere in 2014, but came in fast enough that it may have come from beyond the solar system. 'Oumuamua has friends!

Join us this week for practical DIY instructions on how to enclose an infinite universe into a finite boundary. A conformally compactified hyperbolic cosmos makes great wall art or a special gift for someone who already has everything!

The most spectacular possible end of the universe has got to be The Big Rip. Happily there's only a *little* bit of evidence that it could happen.

"Why, sometimes I've believed as many as 6 impossible things before breakfast." I feel just like the Queen of <3s - the 6 winners of our perpetual motion challenge are the most believable impossible things ever Full winning entries on Insta @matt_of_earth.

The measure of all matter and energy in the universe is inscribed in the fiery speckles of the cosmic microwave background. It's crazy that we've learned how to read this secret language. You can too.

Galaxies also fall into constellations - rings on the sky that are echoes of the first sound waves to reverberate through the universe

RT @matt_of_earth: What does the near future of human space travel look like? @RichardBranson shared some surprising insights with me at hi….

Reflect our universe in the mirror, flip it to antimatter, OR reverse the direction of time and you break physics. But do all three and you get back to where you started. CPT symmetry is weird.

With the bizarreness of string dualities, is it possible for string theory to be at the same time both right and wrong? Our followup to Why String Theory is Right explores the other option.