A multinational team of researchers has successfully sequenced and analyzed the genome of the Steller’s sea cow (Hydrodamalis gigas). Their results show that this large aquatic mammal definitively embarked on the road toward extinction long before the arrival of the first Paleolithic hunter-gatherers in the Beringia, which is estimated to have occurred at least 25,000-30,000 years ago. Life reconstruction of the Steller’s sea cow (Hydrodamalis...