Micrococcus luteus is a Gram-positive, to Gram-variable, nonmotile, Coccus, saprotrophic bacterium that belongs to the family Micrococcaceae. It is urease and catalase positive.
Why is a mammoth more likely to fossilize than a caterpillar? A mammoth is more likely to fossilize than a caterpillar because a caterpillar has no hard tissue. Bones and cartilage are much more likely to fossilize. Edit
Probably the decline came because other animals developed and ate the same food. Such an animal could have been the caribou or reindeer. So with the number of wooly mammoths decreasing and humans hunting them, they became extinct. When all the large mammals were destroyed, humans did not become extinct. The new bifaced stone tools made agriculture possible.