ki4jgt@feddit.org to Ask Lemmy@lemmy.world · 1 day agoIf we restarted Earth with 120 people, how long until we get to 8 billion?message-squaremessage-square37fedilinkarrow-up156arrow-down13
arrow-up153arrow-down1message-squareIf we restarted Earth with 120 people, how long until we get to 8 billion?ki4jgt@feddit.org to Ask Lemmy@lemmy.world · 1 day agomessage-square37fedilink
minus-squareVandals_handle@lemmy.worldlinkfedilinkEnglisharrow-up2·10 hours agoDon’t know about the DNA but White Sands Footprints were dated over 20,000 years old, someone arrived before land bridge was available. General rule in wildlife biology 50/500. Need 50 individuals to prevent extinction, 500 to have potential to evolve/survive threats. Here are a couple papers that say those numbers are too low but I don’t have access to free copies. Second one a little beyond my understanding. https://www.sciencedirect.com/science/article/abs/pii/S0006320713004576?via=ihub https://www.sciencedirect.com/science/article/abs/pii/S0006320706002126?via=ihub
Don’t know about the DNA but White Sands Footprints were dated over 20,000 years old, someone arrived before land bridge was available.
General rule in wildlife biology 50/500. Need 50 individuals to prevent extinction, 500 to have potential to evolve/survive threats.
Here are a couple papers that say those numbers are too low but I don’t have access to free copies. Second one a little beyond my understanding.
https://www.sciencedirect.com/science/article/abs/pii/S0006320713004576?via=ihub
https://www.sciencedirect.com/science/article/abs/pii/S0006320706002126?via=ihub