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TIL Certain species of Finch have Rorschach-like designs on their palates called "gape markings". Each species has a unique design. These are thought to help their parents feed them, and to differentiate between parasitic chicks, who are then rejected. Image gallery in link.

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via reddit.com

4GRw TIL that there was a church of Euthanasia whose motto was “Save the planet, kill yourself”.
XE0mR TIL military planners expected as many as 400 times the casualties that were suffered during D-Day in 1944 for the Allied landing on Japan. The operation was canceled by the atomic bombs and the Japanese surrender.
dVKE TIL that a Congolese Mbuti pygmy, Ota Benga, was ‘exhibited’ at the Bronx Zoo in the monkey house as an example of “earlier stages of human evolution” in 1906.
QNEKe TIL the proportion of Iowa’s energy that comes from wind is at almost 60%, the highest in the United States.
8aRra TIL that Norways oil fund, the world’s largest sovereign wealth fund, boycotts investing in Wal-Mart, due to ethical reasons, among those "blocking workers' efforts to form unions"