Why Is All DNA Right Handed?

PBS Space Time · 20:18

537,506 views · 58,820 likes · Jul 17, 2025

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The molecular basis of all life is mysteriously asymmetric, only using molecules on one side of what should be the equivalent mirrored pairs. The universe has a similar mirror asymmetry, and it may be that our very DNA inherited its twist from the underlying handedness of reality.

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PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE

The molecular basis of all life is mysteriously asymmetric, only using molecules on one side of what should be the equivalent mirrored pairs. The universe has a similar mirror asymmetry, and it may be that our very DNA inherited its twist from the underlying handedness of reality.

Sig…

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