Fully Ice Covered, Snowball World

This four-kilometer-thick ice sheet covered the entire earth, including the oceans, reflecting the Sunlight to a large extent, causing the already cold earth to cool even further.
It is thought that this period, which lasted for millions of years when the world resembled a giant snowball, was repeated several times in previous ages. Of course, this situation had a negative impact on life on earth. Except for the oceans, almost all of the continental single-celled life disappeared, while the majority of the creatures living in the oceans disappeared.

All single or multicellular species (with exceptions) that still survived during this period could only survive around the hot water chimneys in the ocean bottoms.

Geological records show that the Earth has been saved from this very cold period thanks to greenhouse gases such as carbon dioxide released into the atmosphere by volcanic activities. It is thought that the warming of the Earth started the process called "Cambrian Explosion" and life in the oceans spread all over the world with a big speciation explosion.

There are also a considerable number of scientists who do not find Snowball Earth view satisfactory and give an opposite view. Although this view has been widely accepted by geologists for now, the discussions are still not concluded.

Note: The phenomenon of Snowball World is not related to the concept of the "Ice Age" known throughout the society. In the "familiar" Ice Age, which can be dated three or five million years ago, not about the entire world, but about 30-35% of it was covered with ice, and the climate remained temperate in the remaining areas.


Popular posts from this blog

How to delete swarm account?

What is Paper Chromatography and Electrophoresis?

3 Beyond the Dimension: Exploring Other Dimensions in a Nano Scale