PBS Space Time

What If Gravity is Not A Fundamental Force?

Gravity might not be a more fundamental than the force of a stretched elastic band. Maybe gravity is just an entropic byproduct—an emergent effect of the universe’s tendency to disorder. If you allow entropy to keep you in your seat for a bit, I’ll tell you all about it.

What If Gravity is Not A Fundamental Force?

15m 2s

  • Do Black Holes Have to Be Black?: asset-mezzanine-16x9

    Do Black Holes Have to Be Black?

    S10 E17 - 15m 32s

    It turns out there is a way to make a coloured black hole—as long as by colour you mean quantum chromodynamic charge.

  • Was Penrose Right? New Evidence For Quantum Effects In The Brain: asset-mezzanine-16x9

    Was Penrose Right? New Evidence For Quantum Effects In The Brain

    S10 E16 - 18m 26s

    Nobel laureate Roger Penrose is widely held to be one of the most brilliant living physicists for his wide-ranging work from black holes to cosmology. And then there’s his idea about how consciousness is caused by quantum processes. Most scientists have dismissed this as a cute eccentricity—a guy like Roger gets to have at least one crazy theory without being demoted from the smartypants club.

  • How To Detect Faster Than Light Travel: asset-mezzanine-16x9

    How To Detect Faster Than Light Travel

    S10 E15 - 16m 28s

    Warp drives may or may not be possible, but if they are then could a distant alien civilization’s warp fields produce gravitational waves that we could see here on Earth? According to a recent study.. Actually maybe, at least eventually. And we now know just what to look for and how to look for it.

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