Complex sentence: During the last ice age, woolly mammoths ("Mammuthus primigenius") lived on Wrangel Island in the Arctic Ocean and survived until 1700 BCE, the most recent survival of any known mammoth population.
Split into simpler sentences: During the last ice age, woolly mammoths ("Mammuthus primigenius") lived on Wrangel Island in the Arctic Ocean. It has been shown that mammoths survived on Wrangel Island until 1700 BCE, the most recent survival of any known mammoth population.