A rare complete woolly mammoth skeleton on display during Sotheby's Hong Kong spring sales media tour on Friday, March 29, 2019. Woolly mammoths are believed to finally become extinct about 12,000 years ago due to human hunting or climate change.

A visitor looks at the woolly mammoth skeleton, estimated to be worth between 319,000 and 447,000 U.S. dollars, during Sotheby's Hong Kong spring sales media tour in Hong Kong on Friday, March 29, 2019.

A rare complete woolly mammoth skeleton on display during Sotheby's Hong Kong spring sales media tour on Friday, March 29, 2019. Woolly mammoths are believed to finally become extinct about 12,000 years ago due to human hunting or climate change.

A rare complete woolly mammoth skeleton on display during Sotheby's Hong Kong spring sales media tour on Friday, March 29, 2019. Woolly mammoths are believed to finally become extinct about 12,000 years ago due to human hunting or climate change.(Photos: VCG)