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Astrobiology
Looking back on our planet's early history offers a new (and less crazy) meaning for the idea of a "flat Earth."
"I grew up in New Jersey in the 1970s and that experience gave me everything I needed to become a skeptic."
Two of the answers add a dimension to physics that doesn’t belong there. Maybe we could call it "astrotheology."
Finding alien technology on the seafloor would be truly incredible. This extraordinary claim, however, is debunked by the actual evidence.
42mins
The Santa Fe Institute is a cradle of modern research. Our host Kmele meets some of the brilliant minds who work there.
The TRAPPIST-1 system is a treasure trove of possibilities and questions. Observations by JWST have just begun.
Sophisticated rovers have found the conditions for Martian life, as well as the building blocks of life, but never life itself. AI can help.
"If we find just one other example of biology out there, then life is not an accident."
A true scientific view of if, where, and when extraterrestrial life exists is within our grasp thanks to biosignatures and technosignatures.
We don’t need to think about what life is made of but rather what it does.
6mins
Humanity is a type 0 civilization. Here’s what types 1, 2, and 3 look like, according to physicist Michio Kaku.
Every astrobiologist wants to find an alien. But the public should be skeptical when the "aliens" look like tiny humans.
With such a vast Universe and raw ingredients that seem to be everywhere, could it really be possible that humanity is truly alone?
12mins
There are a few theories as to why we’ve never found other intelligent life in our Universe. Physicist Brian Cox walks us through them.
Within the next few decades, we may well have hard evidence for the existence of alien life on worlds light-years distant from Earth.
Some fascinating observations of K2-18b have come along with horrendous, speculative communications. There's no evidence for oceans or life.
Chemical changes inside Mars' core caused it to lose its magnetic field. This, in turn, caused it to lose its oceans. But how?
Scientists may have detected the somewhat smelly chemical dimethyl sulfide on a planet 120 light-years from Earth.
Looking at our planet with post-Copernican eyes has the power to change how we relate to it and each other.
By looking down, scientists are looking back in time.
Despite the vast number of planets in the Universe, Earth's specific evolutionary history guarantees that its life forms — including humans — are utterly unique.
Each of our three nearest stars might have an Earth-like planet in orbit around it. Here's what we'll learn when we finally observe it.
Over 50 years since humans last walked on the Moon, astronaut footprints and rover tracks are still visible. But they won't last forever.
We may be the last generation born not knowing if we are alone in the Universe.
A Harvard astronomer went to the bottom of the ocean, claiming he recovered alien technology. But what does the science actually indicate?
There's an entire Universe out there. So, with all that space, all those planets, and all those chances at life, why do we all live here?
The truth is out there, but it's probably not in the latest whistleblower's report.
Exoplanet LP 791-18d is likely to have an atmosphere and liquid water.
"Superhabitable" planets might be real, but Earth is probably as good as it gets.