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A handout photo made available on February 10, 2020 by the University of Calgary and Royal Tyrrell Museum shows an artist's impression of a Thanatotheristes degrootorum, a newly-discovered species of T-Rex. Experts think the species was wiped out 79million years ago by the much larger T-Rex, which grew up to 40ft and tipped the scales at nine tons. Fragments of the reaper’s skull were unearthed next to a river in Alberta, Canada, by farmer John De Groot while hiking with his family in 2010. The fossils were stored in a drawer at a museum for years, until a University of Calgary researcher first reviewed the find two years ago. (Photo by Julius Csotonyi/The University of Calgary and Royal Tyrrell Museum/AFP Photo)
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