Millions of years ago, the largest organism on earth, that is dinosaurs existed, but in today's era, only remains of dinosaurs are found. The dinosaur was a very large size organism.

There are some interesting facts about Dinosaur: 

1. The term dinosaur was first used by British paleontologist Richard Owen in 1842 to mean "Terrible Lizard".

2. Dinosaurs lived on Earth about 160 million years ago, this time was the middle period of Earth's existence.

3. Just as birds build nests for their eggs, so did dinosaurs also build nests to lay their eggs.

4. Dinosaur tail was about 45 feet long.

5. Although most dinosaurs were very giant-bodied, but some dinosaur species were also equal in size to humans.

6. Dinosaur eggs were as big as tennis balls and football.

7. Dinosaurs that were small in size had a height of 4 - 5 feet, but giant dinosaurs were also about 55 - 60 feet in height.

8. Vegetarian dinosaurs ate 1 ton of leaves in 1 day.

9. It is believed that at that time there were about 1543-2468 species of dinosaurs, some of which could even fly.

10. Dinosaurs could run at a top speed of around 32 km/h.

11. Almost all species of dinosaurs lay eggs, but scientists have so far been able to find eggs of about 40 types of species.

12. The dinosaur had 50 teeth in its mouth so that it could easily break the bones of any other creature.

13. The body of a dinosaur was very large, but the size of an adult dinosaur's brain was smaller than that of a human child.

14. Dinosaur heads had large holes in the skull bones that helped them to keep their heads lighter. The head of a dinosaur was about the size of a car.

15. 650 million years ago, a large meteorite hit the Earth, causing a 112-mile-wide pit. After this, dinosaurs slowly started going extinct.

16. It is believed that dinosaurs had a lifespan of around 200 years.