India, Feb. 12 -- The newly discovered 307-million-year-old skull of a Tyrannoroter heberti has created a buzz in the scientific community, as researchers say it may belong to one of the earliest known herbivorous creatures. Yes, a vegetarian animal.

A study about the discovery was published in the journal Nature Ecology & Evolution. Scientists found the skull inside a fossilised tree stump in Nova Scotia, Canada.

For a long time, scientists thought that when animals first moved from the water onto land, they were all meat-eaters. They believed it took a very long time for animals to figure out how to eat plants. This 307-million-year-old fossil proves that animals began eating their "greens" millions of years earlier than previously th...