Answer: An ancient supercontinent
Notes: Archeologists recently discovered Sahul, a lost landscape aiding ancient human migration across continents during the last ice age. Sahul, a supercontinent, connected present-day Australia, Papua New Guinea, and Tasmania. This land bridge facilitated human movement from Asia to Australia around 70,000 years ago. Ice ages are geologic periods featuring extensive ice cover, lasting millions of years, reshaping continents. The earliest known ice age dates back over 570 million years, during Precambrian time.
