Prehistoric ‘sea’ monster also lurked in rivers, data show
Mosasaurs — a fearsome group of ancient predators — once ruled the seas. Now researchers have turned up a 66-million-year fossil tooth from one. And the big surprise: It came…
Mosasaurs — a fearsome group of ancient predators — once ruled the seas. Now researchers have turned up a 66-million-year fossil tooth from one. And the big surprise: It came…