malformalady:

After being frozen for thousands of years in a Siberian riverbed, this pristine mammoth tusk is a financial boon to the hunter who found it. Mammoths
thrived in northern Siberia until about 12,000 years ago, when a warming
climate—and ancient humans—pushed them toward extinction. Today climate
change—and tusk hunters—are revealing their remains.

Photo credit: Evgenia Arbugaeva/National Geographic