What was the first creature to give live birth?

Scientists have uncovered the first evidence of live births in the group of animals that includes dinosaurs, crocodiles and birds. All examples of this group, known as the Archosauromorpha, lay eggs. This led some scientists to wonder whether there was something in their biology that prevented live births.

Which creature can lay eggs?

Birds and fish are not the only animals that lay eggs. Insects, turtles, lizards, and reptiles lay eggs, too. Only two mammals lay eggs: the platypus and the echidna. All other mammals give birth to live babies.

Where did the first egg come from?

Dinosaurs laid eggs, the fish that first crawled out of the sea laid eggs, and the weird articulated monsters that swam in the warm shallow seas of the Cambrian Period 500 million years ago also laid eggs. They weren’t chicken’s eggs, but they were still eggs. So the egg definitely came first.

Did T Rex lay eggs or give live birth?

No T. rex eggs or nests have ever been found, but fossils of other Tyrannosaur relatives suggest that they laid elongated eggs, roughly 20 or more at a time.

How was first dinosaur born?

Dinosaurs were a successful group of animals that emerged between 240 million and 230 million years ago and came to rule the world until about 66 million years ago, when a giant asteroid slammed into Earth.

How many mammals lay eggs?

There are only two known species of egg-laying mammals: the duck-billed platypus and the spiny anteater also known as the echidna.

When did the first egg appear?

around 312 million years ago
Scientific resolutions If the question refers to eggs in general, the egg came first. The first amniote egg—that is, a hard-shelled egg that could be laid on land, rather than remaining in water like the eggs of fish or amphibians—appeared around 312 million years ago.