During the 70s, a suicide jumper from the Golden Gate Bridge left a note that read "I'm going to walk to the bridge. If one person smiles at me on the way, I will not jump."
If a zebra is attacked, its family will come to its defense circling the wounded zebra and attempting to drive off predators.
In 1944, by a huge coincidence, a crossword puzzle was printed with answers all containing D-Day operation "code names", which sent MI-5 into a panic thinking their invasion plans had been discovered.
Over 3 million people perished from war, slavery, and the mines in Hispaniola under the rule of Christopher Columbus.
In 1963, an East German soldier stole a tank drove it through the Berlin Wall to escape.
Benjamin Franklin published a paper saying America's population growth was so fast, it would surpass Britain in 100 years. This alarmed British leadership and was a factor in their oppression of the colonies.
The Chernobyl power plant didn't go completely off line until the year 2000.
A secret radio belonging to a British POW in WWII was kept so well hidden that, when he visited the camp 62 years later, it was still there.
In 132 AD, a Chinese inventor built a seismograph which, at the moment of an earthquake, expelled a copper ball out of the mouth of a dragon and into the mouth of a frog.
The Guinness World Records stopped awarding the fattest cats or any other animal to discourage deliberate overfeeding.