Crater is about 150 kilometers wide
Scientist have concluded that the crater was created about 65 million years ago
Rare metal is found in asteroids
The metal is called iridium
Scientist have discovered levels of iridium 30 times greater than average KT boundary
Pieces once molten rock, called impact ejecta, are evidence of a large explosion
There are crystal called shocked crystal
Shocked crystal show a unique pattern caused by a high energy impact or explosion