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cosmosmagazine.com
4kA8X
TIL thanks to tree rings, we know global cooling caused piracy.
OGnE6
TIL: Turtle ant soldiers are tree-dwelling insects with strangely oversized heads, which they use to block the entrances of their nests, essentially acting as living doors.
NXgJM
TIL that ethologist John B. Calhoun created "rat utopias" in order to conduct over-population experiments between 1958 and 1962. Ultimately, the experiments ended in societal collapse.