Tim Urban
@waitbutwhy · Jul 16, 2020
Around the early 1800s there were 128 random strangers on Earth, each of whose genes makes up 1/128 of you. Some prob. knew each other and had no idea they'd share a common descendant. There are 127 critical sex moments in this chart. If just 1 doesn't happen you never exist. 1/5
Elon Musk
@elonmusk
Some contribute more. Y chromosome & mitochondria are constant, except for mutations.
01:02 AM · July 19, 2020 · 0 views
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