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PBS Space Time
What If Alien Life Were Silcon-Based?
Season 9
Episode 3
Life as we know it is carbon-based, but does it have to be this way? There’s another element on the periodic table that shares some of the key properties of carbon but is far more abundant on most planets. I’m talking about silicon. So is there silicon-based life out there?
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12:43
The most precious substance in our universe is not gold, nor oil. It's antimatter.
11:32
Despite what the cosmic censorship hypothesis suggests, naked singularities may exist.
13:12
It's very hard to study black holes but studying black hole analogies makes it easier.
14:34
Sir Roger Penrose's Conformal Cyclic Cosmology hypothesis.
13:58
Viruses don’t just influence organisms, they’re incredibly important on a planetary scale.
12:41
Does gravity require extra dimensions?
14:21
This is a map of the multiverse.
13:52
How Luminiferous Aether led to Relativity.
14:01
How do you learn the age of the universe when there’s no trace left of its beginnings?
14:31
When do we get to wormhole ourselves out of here?
13:31
Recently we discovered that its violent past was much more recent than we thought.
13:38
How can we be sure about timescales so far beyond the capacity for human intuition?