The largest snake python can grow up to 7.5 meters long. But, this relative of the boa family, named as Titanoboa can grow up to 13 meters in length. This huge creature existed 58-61 million years ago.
The biggest animals that ever lived on the Earth were Amphicoelias. This breed of dinosaurs lived 45 million years ago. They could grow up to 58 meters in length making the world around look little.
9. Giant Deer
Giant Deer, also known as Irish Elks used to exist 2 million years ago. They became extinct over time as the density of forests increased. Their large antlers made it impossible for them to move around the forests.
These images clearly prove that the earth was once ruled by creatures lot bigger than us. Also, check how the earth has been changed in last 100 years here.