You know what kind of weather to expect at each time of year, at least for the place where you live. That’s because you’re familiar with the climate—the typical range of weather for a region. Did you know that Earth’s climate hasn’t always stayed the same? Every once in a long while, the Earth goes through a period of especially cold weather called an ice age.


Today, ice covers Earth’s North and South poles. These ice caps are called polar glaciers. During an ice age, the polar glaciers grow larger. At the height of an ice age, glaciers may cover as much as a third of the Earth. Canada, the northern United States, northern Europe, and northern Russia all get covered by ice. This ice can be more than a mile (1.6 kilometers) thick.

Much of the world’s water gets frozen to make these glaciers. This water comes from the oceans, and sea level drops as a result. Places that had been under water become dry land. Many plants and animals adapt to these changes. Those that do not adapt die out.

During the last ice age, animals with warm shaggy coats flourished. For example, the woolly mammoth, a large elephant-like animal, roamed icy areas of Earth. The mammoths probably used their huge tusks to scrape away the snow in search of plants to eat. Their thick woolly coats protected them from the cold.


An ice age can last for tens of millions of years. The warm periods between ice ages last hundreds of millions of years.

Earth can warm up somewhat for short periods during an ice age. A warm time within an ice age is called an interglacial. Several interglacials can occur during an ice age. Each one may last for 10,000 years or more.

Ice ages are not like seasons. They do not arrive on any known schedule. In fact, no one can tell when an ice age is beginning. The climate changes very slowly.


The most recent ice age started about 1.6 million years ago. It ended about 10,000 years ago. Or did it? The Earth has warmed up since then, but we may not be between ice ages now. There’s still a lot of ice around the North and South poles, maybe more than there should be between ice ages. Many scientists think we are only in an interglacial period. The ice age may resume sometime in the next few centuries.

<a href="" target="_self">Danny Ballan</a>

Danny Ballan


Danny is a podcaster, teacher, and writer. He worked in educational technology for over a decade. He creates daily podcasts, online courses, educational videos, educational games, and he also writes poetry, novels and music.

You may also Like

A Short Introduction to Astronauts

A Short Introduction to Astronauts

An astronaut is a space traveler. Astronauts fly into space on spaceships. They go where there is no air, higher than any airplane can fly. While they orbit (go around) Earth, they are weightless—they float and feel no gravity.

read more
A Short Introduction to Amphibians

A Short Introduction to Amphibians

Amphibians are very interesting creatures. They live a kind of double life. They spend the first part of their life in water and the second part on land. In fact, the word amphibian comes from two Greek words that mean “both” and “lives.”

read more


Submit a Comment

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Recent Posts


Follow Us

Get Your Weekly Dose of English Plus Content!

Don't miss out on the latest from English Plus – sign up for our weekly email digest and get all the content we posted last week delivered straight to your inbox. From informative articles and insightful podcasts to engaging videos and more, our weekly digest has everything you need to stay up to date on the world of language learning and culture. Plus, as a subscriber, you'll be the first to know about our upcoming events, special promotions, and more. So what are you waiting for? Sign up today and get your weekly dose of English Plus content!

You have Successfully Subscribed!

Pin It on Pinterest