We've known that T. rex and other giant tyrannosaurids, such as Tarbosaurus, evolved about 80 million years ago from much earlier,
much smaller dinosaurs.
Not exact matches
Cultures all over the World recorded bears, lions, eagles, deer, buffalo, elephants and other mammals
much smaller than
dinosaurs, but totally ignored the
dinosaurs, which were many times larger and more fearsome!!
Gargantuan
dinosaurs like brontosauruses, or gigantic mammals like Baluchitherium could easily have inhaled insects, and they would have to dodge ants, beetles, worms, frogs, snakes, and even
much smaller mammals with each gargantuan step.
This
small dinosaur was a close relative of Velociraptor, but in both body shape and inferred lifestyle it
much closely recalls some waterbirds like modern swans.
The ancient surface where these footprints were found is also covered with the tracks of
much smaller theropod
dinosaurs.
They served primarily to protect the
smaller predatory
dinosaurs — which would eventually give rise to birds — from losing too
much body heat.
With throats and jaws
much wider than other pterosaurs, they could have swallowed
small dinosaurs whole.
Most scientists agree that birds evolved from
small dinosaurs at least 150 million years ago, and the earliest known birds have wings and feathers that look
much like those of modern birds.
He said in part, «We will create
smaller, more intelligent engines with so
much power that they will turn V8s into
dinosaurs.
But the
smaller dinosaurs excite just as
much interest.