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TIL Hummingbirds have an exceptional memory due to an enlarged hippocampus. This allows them to remember the exact location of specific hummingbird feeders along their migration path from North America to Mexico, the Caribbean, and Central America.

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D18YY TIL on this day, July 30 1864, Union troops used 8,000lbs of gunpowder to blow a massive hole in the enemy trenches during the Siege of Petersburg. Due to a last minute change, the troops assigned to exploit the explosion were untrained and their commander was drunk, leading to a terrible loss.
d8Ojd TIL frozen pipes burst not because ice expands through the wall of the pipe, but because the expanding ice compresses water downpipe, building pressure until it bursts
9ZDX TIL that Killer Whales aren’t whales but a species of dolphin. The confusion stems from the Spanish, who called them “whale killers”.
P1WrG TIL in the 50s Disneyland offered fishing on Tom Sawyer Island in an area called Catfish Cove. Guests could borrow a pole and a can of worms to try and catch fish. They offered to clean, ice and store them until close at a restaurant. It was promptly ended after fish were discarded all over the park
868a TIL the Nickelodeon cartoon series, The Angry Beavers, is one of the only cartoons where a clock on the wall–visible in most episodes–updates in real time.