The newly described mosasaur Tylosaurus rex spanned up to 43 feet (13 meters) long and may have been one of the fiercest ...

Researchers at SMU and the Perot Museum have identified a new species of mosasaur, a 'T. rex of the sea' that lived alongside ...

There's a new T. rex in the fossil record, only this one terrorized the ancient seas. New research led by scientists at the ...

One of Chicago’s most famous museums could become free again with expanded free Sundays and public-access areas already ...