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Researchers say they have discovered
humans got teeth. The researchers are from Uppsala University in Sweden. They say that
teeth "first evolved 400 million years ago". They believe our teeth came from an
fish called an acanthothoracid. The researchers studied a
of the fish. It was difficult to study because the fish is encased in
. The researchers had to use the
X-ray machine in the world to analyse it. They used the X-ray
to "digitally dissect" the fish. The researchers discovered that the fish's teeth were
similar to human teeth. The researchers also said humans and 60,000
of jawed vertebrates living on Earth
come from this fish.
