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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 Time42

Video thumbnail: PBS Space Time LIGO's First Detection of Gravitational Waves!

PBS Space Time

LIGO's First Detection of Gravitational Waves!

Gravitational waves have officially been detected by LIGO!

7:29

LIGO's First Detection of Gravitational Waves!

7:29

Video thumbnail: PBS Space Time Will Mars or Venus Kill You First?

PBS Space Time

Will Mars or Venus Kill You First?

Our neighboring planets are not exactly the most hospitable places.

8:44

Will Mars or Venus Kill You First?

8:44

Video thumbnail: PBS Space Time The Origin of Matter and Time

PBS Space Time

The Origin of Matter and Time

Time to redefine our preconceived notions about mass and time.

9:21

The Origin of Matter and Time

9:21

Video thumbnail: PBS Space Time When Time Breaks Down

PBS Space Time

When Time Breaks Down

We learned how motion gives matter its mass, but how does motion affect time?

8:04

When Time Breaks Down

8:04

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