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The red color of Mars is mere inches deep

The red color of Mars is mere inches deep

The surface and atmosphere is colored by ferric oxides. Beneath a very thin layer, mere millimeters deep in places, it’s not red anymore.
Go to the profile of Ethan Siegel
Ethan Siegel
May 22
Does physics truly have anything to say about consciousness?

Does physics truly have anything to say about consciousness?

Many, from neuroscientists to philosophers to anesthesiologists, have claimed to understand consciousness. Do physicists? Does anyone?
Go to the profile of Ethan Siegel
Ethan Siegel
May 21
Astronomers just found the smallest galaxy ever

Astronomers just found the smallest galaxy ever

With stars, gas, and dark matter, galaxies come in a great array of sizes. This new one, Ursa Major III/UNIONS 1, is the smallest by far.
Go to the profile of Ethan Siegel
Ethan Siegel
May 20
11 NASA astrophysics missions face risk of cancellation

11 NASA astrophysics missions face risk of cancellation

NASA astrophysics, which gave us Hubble, JWST, and so much more, faces its greatest budget cut in history. All future missions are at risk.
Go to the profile of Ethan Siegel
Ethan Siegel
May 19
Starts With A Bang podcast #117 — Gravitational waves and the Universe

Starts With A Bang podcast #117 — Gravitational waves and the Universe

Just 10 years ago, humanity had never directly detected a single gravitational wave. We’re closing in on 300 now, with so much more to…
Go to the profile of Ethan Siegel
Ethan Siegel
May 17
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