Resumen de America's last mammoths died of thirst
Long after most of their kind had died out, one group of woolly mammoths was still surviving on an Alaskan island. Now people know why they finally bit the dust: a warming climate caused their lakes to dry up. Mammoths were in crisis at the end of the last ice age, when human hunters began to settle in their habitat. Most mammoths on mainland Asia and North America went extinct over 13,000 years ago. But a few hardy herds clung to Arctic islands where people did not arrive for several more millennia. One of these populations retreated to the Bering land bridge linking Siberia with North America. As the sea rose, they became stranded on the small, low Alaskan island now called St Paul.
