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TIL the ancient Greeks understood how to use the three seashells: "The anthropologist also cited an ancient Greek proverb which said 'three stones are enough to wipe one's arse'."

Read more bbc.co.uk

via reddit.com

4XKWR TIL the smaller chunks that break off of icebergs are officially called "bergy bits".
1bgO TIL of a homing pigeon called Cher Ami that saved close to 200 lives during WW1 by delivering a message. The pigeon was shot through the breast, blinded in one eye and had its leg hanging only by a tendon upon arriving with the message.
Bg0Er TIL thousands of "low head dams" (aka "killer dams" or "drowning machines") were built on US waterways in 1800s, are nearly invisible from upstream, have killed hundreds of people, often serve no modern purpose, and for all that, are largely unregulated
OGLm1 TIL the fastest spinning celestial object in the universe is a Neutron star called PSR J1748-2446. It rotates 716 times every second and it's equator moves at about 25% the speed of light. It is also has a magnetic field a trillion times stronger than the Sun’s.
PY7ww TIL that there is an International Bat Appreciation Day, which is marked every year on Apr 17th.