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TIL the first successful attempt to make a longer acting insulin was accomplished by combining insulin with protamine extracted from trout semen

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mxRro TIL: Alexandre Dumas was black
BrP9y TIL despite being depicted on California's flag, the California grizzly bear has been extinct since 1924.
Ypnlv TIL The bottlenose dolphin sleeps by shutting down half its brain along with the opposite eye. The other half remains awake at a low level of alertness to watch for predators and to surface to breath. After about two hours it reverses the process so the other half can rest.
lojWK TIL, superfetation is the simultaneous occurrence of more than one stage of developing offspring in the same animal, essentially getting pregnant while already pregnant.
ZjEY TIL Cursing while on the telephone with someone is a Class 1 Misdemeanor in the State of Virginia