Name: Plesiosaurs 101 | National Geographic
Uploaded: 2021-11-03T05:06:36.000Z
Duration: 3 min 23 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

基礎受動態

to be mythical creatures at the center of tall tales.

But science tells a story of real-life monsters

that first appeared about 215 million years ago.

the long-necked plesiosaurs and the short-necked pliosaurs.

with large bodies and small, triangular heads

Their most signature feature was their long necks.

plesiosaur necks had up to 76 distinct vertebrae,

over 10 times more than that found in humans.

that they were, in fact, relatively stiff.

This allowed the plesiosaurs to stay streamlined

while swimming or while hunting fish, squid, and clams.

While the Plesiosaurs evolved long necks and small heads,

their pliosaur cousins went the opposite direction.

Their necks were short and their heads were large,

But much like plesiosaurs, pliosaurs were massive,

Despite their large size, pliosaurs were excellent swimmers,

capable of reaching speeds near 10 kilometers per hour.

Their speed, along with their great size,

allowed pliosaurs to become ferocious predators,

devouring large marine animals and even other Plesiosauria.

pliosaurs and plesiosaurs shared a few key features

that were characteristic of the genus Plesiosauria.

They used all four of their flippers to swim

And while they spent their entire lives in the sea,

coming up to the surface for oxygen before every dive.

but today, they continue to be a point of fascination,

inspiring legends as grand as the monsters themselves.

字幕リスト動画再生

Plesiosaurs 101 | National Geographic

entire

massive

ancient

evolve