Spinosaurus, the only known semiaquatic dinosaur predator, joins Tyrannosaurus, Giganotosaurus and Carcharodontosaurus among the largest meat-eating dinosaurs.
At a remote and barren Sahara desert site in Niger, scientists have unearthed fossils of a new species of Spinosaurus, among the biggest of the meat-eating dinosaurs, notable for its large ...
Arteries carry oxygenated blood away from your heart. They have thick walls and a muscular layer that keeps your blood moving. Arteries can be as wide as a nickel (about two centimeters). They are the ...
Tyrannosaurus rex probably wasn't full-grown until around age 40, new research suggests. Kirk Johnson / National Museum of Natural History / Smithsonian Institution Over the years, Tyrannosaurus rex ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results