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TIL The very distinctive black and white pattern of Killer Whales (Orcas) serves as a form of camouflage from their prey. Like military airplanes that are colored light on the undersides and dark on top, this color pattern makes the whales less visible from both above and below.

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86j8 TIL that during the 1918 flu pandemic, 62 Boston prisoners volunteered to be injected with infected tissue and sprayed with infectious aerosols with a promise of release if they survived. All of the prisoners lived, but the ward doctor died soon after.
XEyer TIL Reagan and Gorbachev Agreed to Pause the Cold War in Case of an Alien Invasion
loAjG TIL about the blackpoll warbler, a 5-inch-long bird that weighs about as much as a ballpoint pen. In their fall migration they take off from the northeastern US and don't stop flying until they reach South America- 72 to 88 hours and 1900 miles of nonstop flight over the Atlantic Ocean is involved.
mJko TIL: A POW during the Vietnam War named James Stockdale said to survive in such arduous conditions you must renounce optimism for stoicism. His optimistic fellow captives all died. Having a blindly optimistic view worsens your chances of survival. This is called ‘The Stockdale Paradox’.
wLELP TIL that Along a lonely stretch of highway in Awa-shi, Japan, a rare vending machine sells homemade meals of fresh curry over rice. The vending machine owner, Tadashi Yoshimoto, grows the rice in every meal just down the road on his own farm!