This technique was used on a bone from the first Tolo Lake mammoth specimen excavated in 1994. BP BP is used by researchers to date an archaeological site, fossils, or time period. Excavation Carefully removing layers of dirt or sediment to find fossils or artifacts made by people from long ago. Extinct No longer existing or active, gone out. The mammoth is an extinct animal.
Extinction Bring to an end, wiping out, or destruction.
The warming of the climate is one possible reason for the extinction of mammoths. The times when ice advanced. At four times during the Pleistocene, thick ice sheets covered the northern part of North America. Herbivore A plant eating animal, an animal that eats only plants. The period from the end of the last great Ice Age through today.