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TIL that when lava gets erupted at the mid-ocean ridge axis it cools and turns into hard rock. As it cools it becomes permanently magnetized in the direction of the Earth’s magnetic field.

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paeG TIL that modern English surnames were given between the 12th and 14th centuries for taxation purposes in England, and were based on parentage (eg Donaldson), location (eg Wood, Lane), personal attributes (eg Short, Long) and occupation (Smith, Miller).
o0xK TIL If the ancient Persians decided something while drunk, they had a rule to reconsider it when sober and if they made a decision sober, they would reconsider it while drunk.
YyBd TIL: The original microwave output 3,000 watts and could cook a steak well-done in 50 seconds.
e0176 TIL that the Mongolian national baseball team has yet to play a full nine inning game because of the application of the mercy rule
W4d8 TIL that after the attack on Pearl Harbor, Canada declared war on Japan before the United States did.