Pleistocene

The Pleistocene: A Time of Ice and Change

The Pleistocene is an amazing time in Earth's history, often called the Ice Age. It lasted from about 2.58 million to 11,700 years ago. During this time, Earth had many cold periods called glacial periods and warmer periods called interglacials. The weather changed a lot.

Because of these cold periods, huge sheets of ice covered much of North America and Asia. Temperatures dropped so low that sea levels dropped by as much as 120 metres lower than today. This allowed people and animals to move between Asia and North America through a land bridge called Beringia.

This time was very important for human history. Early humans, known as archaic humans, first appeared in Africa and later spread to many parts of the world. Later in the Pleistocene, modern humans left Africa and moved to new places, including Australia and the Americas for the first time.

The Pleistocene also had many large animals that are different from animals today. Some of these animals were mammoths, mastodons, tigers, lions, aurochs, and short-faced bears. By the end of this period, many of these large animals went away, but smaller animals like wood mice and whitetail deer became more common.

The word "Pleistocene" was created by Charles Lyell in 1839. He used it to describe rock layers in Sicily. The name means "most new" or "newest" using words from the Greek language. This shows how the Pleistocene is different from older times.