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Astronomy
Many impact craters on Earth have been erased thanks to wind, water, and plate tectonics. But scientists have clever ways to find them.
It's the best-known transcendental number of all-time, and March 14 (3/14 in many countries) is the perfect time to celebrate Pi (π) Day!
Somewhere out there in the Universe is the heaviest neutron star, and elsewhere lies the lightest black hole. Where's the line between them?
The 1,200-year-old "Book of Ingenious Devices" contains designs for futuristic inventions like gas masks, water fountains, and digging machines.
What kind of object will you form? What will its fate be? How long will a star live? Almost everything is determined by mass alone.
If stars don't go supernova at first, they can get a second chance after becoming a white dwarf. But can their companions survive?
The road to intelligent life is a series of hard steps.
In our Solar System, even the two brightest planets frequently align in our skies. But only rarely is it spectacularly visible from Earth.
All human development, from large cities to small towns, shines light into the night sky.
Unless you confront your theory with what's actually out there in the Universe, you're playing in the sandbox, not engaging in science.
JWST's revolutionary views arrive in high-resolution at infrared wavelengths. Without NASA's Spitzer first, it wouldn't have been possible.
The Fermi paradox (along with the subsequent Drake equation) is so difficult that even brilliant thinkers can make little dent in it.
An incredible composite image of Pandora's Cluster, Abell 2744, simultaneously showcases both our impressive knowledge and vast ignorance.
We may have discovered alien life already but rejected the evidence too quickly because it seemed false at first glance.
The glorious sights that JWST keeps revealing are less than a millionth of the whole Universe. Just imagine what else is out there.
You can't throw a DART at everything in space.
Since its observation discovery in the 1990s, dark energy has been one of science's biggest mysteries. Could black holes be the cause?
It is a story with nebulous beginnings and no discernible end.
The secret ingredient is violence, and it just might indicate that "moonmoons" aren't as uncommon as most astronomers think.
Some microbes can withstand Earth's most inhospitable corners, hinting that life may be able to survive similarly extreme conditions on other worlds.
A fascinating 90 minute podcast between Dr. Ivanna Escala and Ethan Siegel on Starts With A Bang!
From the earliest stages of the hot Big Bang (and even before) to our dark energy-dominated present, how and when did the Universe grow up?
NASA has finally chosen which flagship mission, like Hubble and JWST, will launch in ~2040. Detecting alien life is now a reachable goal.
19 years ago, the Bullet Cluster provided an empirical proof for dark matter. Even today, modified gravity still can't explain it.
Air currents in our atmosphere limit the resolving power of giant telescopes, but computers and artificial stars can sharpen the blur.
7mins
Astronomer Michelle Thaller explains the healing power of physics after losing her husband.
We are traveling in a realm that once exclusively belonged to the gods. Space travel will force humanity to rethink everything.
The Universe isn't as "clumpy" as we think it should be.
The Universe certainly formed stars, at one point, for the very first time. But we haven't found them yet. Here's what everyone should know.
A history of injustice and the greatest natural location for ground-based telescopes have long been at odds. Here's how the healing begins.