Sahul

About Sahul:

• It can be termed as a supercontinent which was stood exposed on the Earth's surface when humans were in the middle of what can be termed as the last ice age.
• Since the ice age led to glaciation of water levels on the planet, it ended up exposing parts of land like Sahul which connected to currently known Australia to Papua New Guinea in the north and Tasmania in the south,
• It helped humans in ancient times to cross continents from Asia to Australia almost 7,000 decades ago.

What is Ice age period?

• It is any geologic period during which thick ice sheets cover vast areas of land. Such periods of large-scale glaciation may last several million years and drastically reshape surface features of entire continents.
• The earliest known took place during Precambrian time dating back more than 570 million years.
• The most recent periods of widespread glaciation occurred during the Pleistocene Epoch (2.6 million to 11,700 years ago).
• Ice ages are not uniformly cold. There can be colder and warmer periods during the overall ice-age period.
• Colder periods lead to more extensive areas of continental ice sheets, valley glaciers and sea ice, while warmer periods lead to reduced areas of ice.