Question

2. How many kinds of dinosaurs lived on the earth?​

Answer 1

The short answer is we know of about 900 valid dinosaur species that existed. “Valid” means scientists know the dinosaur from enough of the skeleton bones to feel pretty sure that it differs from all other known dinosaurs

At present over 700 different species of dinosaurs have been identified and named. However palaeontologists believe that there are many more new and different dinosaur species still to be discovered.

Answer 2

Answer:

900 valid dinosaur species that existed. “Valid” means scientists know the dinosaur from enough of the skeleton bones to feel pretty sure that it differs from all other known dinosaurs. There are hundreds of others which have been named, but are not considered “valid” as they were not based on well-enough preserved fossils.

To give you the long answer, first I need to explain what a dinosaur is, and when they lived.

What exactly is a dinosaur, anyway?

Dinosaurs were a group of medium to large reptiles that lived between 235 million years ago and 66 million years ago. Not many people know this, but the main thing that makes a dinosaur a dinosaur is their foot structure; they have a special kind of ankle joint. Their feet bones are like that of a bird.

Explanation:

I hope it helps you.

plz mark me as brainliest

thank you ❤️✨