About 500 million years ago, not a single creature had a skull. Over time, these bony plates evolved into the structural marvels that vertebrates—animals with spinal cords, aka you, me, and your pug, ...

PHOENIX, Ariz.: A number of alien-like skulls have been discovered in a 1,000 year old cemetery in Mexico. The finding initially stunned the researchers, however, upon closer inspection the skulls ...

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