🧬 Life
▪️ First Animals migrate to land 530 MYA
▪️ Vertebrae immune system 500 MYA
🌱 First Algea and Land Plants 450 MYA
🧊 Andean-Saharan Ice Age 450-420 MYA
⚡️Major Extinction Spasms
Silurian Period 450 MYA
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