› added 12 years ago

96

TIL despite claims of being inefficient, recycling is cheaper than mining and refining aluminum

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6EOgX TIL that, contrary to expectations, objects with greater drag generate less heat when entering the atmosphere. This is because a pocket of air forms in front of the object. After this was discovered in 1951, vehicles such as the Apollo capsule were designed to enter the atmosphere blunt-end first.
VwP8 TIL that there are more overweight people than starving people in the world
R7MGw TIL that "Forgotten Baby Syndrome," the tragic phenomenon behind infant hot car deaths, is caused by change in routine and can happen to anyone
d8V49 TIL that the 7th time that park ranger Roy Sullivan was struck by lightning coincided with the 22nd time he fought off a bear with a stick.
mMmo TIL that one theory on why we are ticklish is that it serves as a mechanism for developing combat skills. Most often practiced from parent to child, tickling activates vulnerable areas on the body that develop a defensive reaction while producing laughter that encourages the ‘attacker’ to continue.