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TIL the earliest of all prehistoric whales was a three foot long, fifty pound, dog-like creature that lived entirely on land. Its lineage is a case study as an entirely terrestrial mammal evolving into an entirely aquatic lifestyle.

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QJ1AE TIL Chris Espinosa is Apple Inc.'s longest-serving employee, having held roles in documentation, marketing, engineering, and more. He's been working at Apple since 1976, which is over 45 years.
d8Klj TIL until modern times, when artificial lighting allowed us to stay awake longer, most people would go to bed around sunset. The actual time spent sleeping was split into two phases – known as first sleep and second sleep.
gMQVy TIL Children can have permanent neurological damages from neglect and abuse caused by the constant increased cortisol and adrenaline in their bloodstreams in those states. It is called Toxic Stress Syndrome
GyyQ TIL that Harvard earns enough money on interest from its endowment that it could offer free tuition to all students and still make profit on the interest.
8Y7a TIL that a man who had previously plotted to blow up the Alfred P. Murrah Federal Building was executed on the same day of the 1995 bombing. He spent his last hours alive watching coverage of the explosion on TV.