Xenomorphs? Alien-human hybrids? Once again, truth is stranger than fiction. And newly discovered skulls in China reveal just how alien our ancestors were.

And yet, perhaps not so alien after all.

Turns out, elongated skulls were a widespread ancient phenomenon.

Discoveries from Peru to Germany can now be added the resting places of distorted skulls from China dating back to 10,000BC.

Not that these are the oldest. Examples found in Australia are believed to be 13,000 years old.

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