You might take it for granted now, but your jaw is the result of an evolutionary journey lasting over 400 million years.
This claim comes from a new study, which found the iconic feature that helps us chew can be traced back to an extinct type of fish called a placoderm.
Previously, researchers had believed our jaws evolved separately to these ancient creatures, because they bore little resemblance.
But the discovery of a 423-million-year-old fish fossil has put the final pieces of the mystery into place.
Read more: http://www.dailymail.co.uk/sciencetech/article-3855376/Our-jaws-evolved-ancient-FISH-420-million-year-old-fossil-reveals-bones-faces-formed.html#ixzz4Nor9SGMK
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