Scientists have discovered that the triceratops was not actually a separate species of dinosaur, but in fact the juvenile form of the rarer torosaurus.

According to New Scientist, researchers found that as the triceratops aged its frill smoothed, and became thinner in the same places that Torosaurus has two holes.

Which led them to the conclusion that the reason they had never found a juvenile torosaurus, was because the two species were in fact the same, simply at different ages.

This shape changing was possible because the frill and horns remained spongy and full of blood vessels, not really hardening into solid bone. The only modern species that does anything like that is the cassowary - which developes a spongy crest when it is about 80% fully grown.

Thanks to these findings, torosaurus is no more, and has been reclassified as triceratops.