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PBS Space Time

Is It Irrational to Believe in Aliens?

Video duration: 6:49Expires: 10/29/20Video has closed captioning.

Aliens! Could humans really be alone in this expansive universe? And if we're not, how come we've never made contact with other intelligent life? Everyone's thought about it; especially members of the scientific community. Join Gabe as he presents some of the most popular theories that scientists use to rationalize their support or skepticism of the existence of aliens.

Episodes of PBS Space Time69

Video thumbnail: PBS Space Time Strange Stars

PBS Space Time

Strange Stars

These stars may be the most massive stellar remnant just shy of forming a black hole.

9:58

Strange Stars

9:58

Video thumbnail: PBS Space Time Did Dark Energy Just Disappear?

PBS Space Time

Did Dark Energy Just Disappear?

Did all of dark energy just vanish?

12:22

Did Dark Energy Just Disappear?

12:22

Video thumbnail: PBS Space Time The Many Worlds of the Quantum Multiverse

PBS Space Time

The Many Worlds of the Quantum Multiverse

Is our universe a definitive single reality? Can we even answer that question?

12:52

The Many Worlds of the Quantum Multiverse

12:52

Video thumbnail: PBS Space Time The First Humans on Mars

PBS Space Time

The First Humans on Mars

What might a budding Mars colony look like?

7:51

The First Humans on Mars

7:51

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