New T. rex cousin reportedly complicates understanding of tyrannosaur evolution

Scientists in Canada discovered a new tyrannosaur species related to T. rex, according to Henry Sharpe in New Scientist. Its fossils suggest the animal was 8 metres long with lengthy, lean legs. Sharpe calls it a rare addition to an unusual branch of the family tree and says it complicates our understanding of tyrannosaur evolution, though the accessible portion of his report does not explain how.