00:00Crows don't just remember you, they hold a grudge for generations.
00:06In 2006, scientists at the University of Washington proved it.
00:11They wore a creepy caveman mask while trapping and tagging crows.
00:15Nothing happened at first.
00:17Then, they wore the same mask around campus.
00:20The crows attacked.
00:22They cawed, they dive-bombed, they followed them.
00:26It wasn't just the crows they trapped.
00:28Other crows who had never even seen the trapping joined in, and it didn't stop after a week.
00:34Five years later, a third of all crows on campus still attacked the mask.
00:40Fifteen years later, they still remembered.
00:44Here's the wildest part.
00:46The crows taught their babies, and their babies taught their babies.
00:50Young crows who were never alive during the trapping knew exactly who to hate.
00:56They never forget a face.
00:58So if you see a crow, be nice to it.
01:00It will tell its entire family about you.
