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# Why Is All DNA Right Handed?
- URL: https://www.cascadepbs.org/show/pbs-space-time/episode/why-is-all-dna-right-handed-3jeiyi/
- Published: 2025-08-13T16:00:56.000Z
- Updated: 2025-11-14T06:30:23.000Z
- Description: It may be that our very DNA inherited its twist from the underlying handedness of reality.
- Author: Cascade PBS Staff
- Tags: PBS Space Time, Season 11, Episode 8, #ZZZ_Episode_a0997eaa-60dc-48c8-b251-24e824d61e37, #episode, #ZZZ_Show_ae70f836-13b6-4c9d-b61f-99f7b8bc29eb, #v1.16

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.