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We now offer the Cool It! card game in our Science Store. Cool It! is the new card game from UCS that teaches kids about the choices we have when it comes to climate change.
This is an image of the Earth, 240 M ago.
Image courtesy of the Wikipedia Commons

The Triassic

This period of time in Earth's history is a period when dinosaurs roamed the Earth. This period lasted 37 Million years. During this time, the continents we know today were combined into a giant continent named PANGAEA.

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Learn about Earth and space science, and have fun while doing it! The games section of our online store includes a climate change card game and the Traveling Nitrogen game!

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The History of Martian Volcanoes

During its earliest history, Mars was hit with many asteroid-like boulders. The impacts of these boulders caused Mars to become warm enough for continents to drift across the surface just as they do on...more

The Archean

The Archean is the name of the age which began with the forming Earth. This period of Earth's history lasted a long time, 2.8 billion years! That is more than half the expected age of the Earth! And no...more

Salts in the Earth's early ocean

We all know that today ocean waters are very salty. There aren't many sedimentary rocks older than 2.5 billion years (see geologic time) that means that there must have been mostly igneous rocks at the...more

The Triassic

This period of time in Earth's history is a period when dinosaurs roamed the Earth. This period lasted 37 Million years. During this time, the continents we know today were combined into a giant continent...more

Earth's Primordial Atmosphere

Scientists ask many questions. One of the questions they like to ask is "Where did the atmosphere come from?" As always, scientists chip in with many different, and sometimes conflicting answers. Some...more

Earth's Early Ocean

Once the Earth began to cool, water vapor, one of the volatiles, began to condense and form an ocean. According to the Goldilocks theory, Earth is at just the right distance from the sun for the temperature...more

Iron Ore Deposits

Eventually, photosynthesis by the earliest forms of plant life (a form of life capable of feeding itself instead of feeding off of others) began to produce significant amounts of oxygen. One important...more

K-T Extinction (Why Did the Dinosaurs Go Extinct?)

Why did the dinosaurs go extinct? No one knows for sure, but there are some explanations that seem to make sense. At the time the dinosaurs and lots of other species died out (which is sometimes called...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF