Sixty-five million years ago, dinosaurs like the tyrannosaurus rex and the triceratops once roamed the Earth. Suddenly all these great creatures disappeared and it’s not quite sure how they vanished from existence. There are several theories to explain what is known to be the most popular mass extinction of all time.
Asteroid
The belief that an asteroid struck the planet earth is the most common and most believed theory. This theory has more evidence to back it up than just a giant rock hitting the Earth. This theory is backed up by the metal known as iridium. Iridium is not very common on the surface of the Earth, but it is very common in meteorites. There is a thin layer of iridium found all over the world. To specify things even further,
Asteroid
The belief that an asteroid struck the planet earth is the most common and most believed theory. This theory has more evidence to back it up than just a giant rock hitting the Earth. This theory is backed up by the metal known as iridium. Iridium is not very common on the surface of the Earth, but it is very common in meteorites. There is a thin layer of iridium found all over the world. To specify things even further,