How was the Earth made? - Audrey, age 5. More than 4,500,000,000 years ago – before even the dinosaurs existed, before even the Earth existed – there was space. And in one part of space ...

It happened 4.5 billion years ago, when the solar system was full of orbiting space rocks. This debris clumped up in a ...

Historical clues and the expertise of geologists reveal how powerful forces shaped the planet; each episode examines a single location, such as the San Andreas Fault and Yellowstone National Park.

Meteors are smaller − typically the size of pebbles or even dust. About 65 million years ago, a huge asteroid struck the Earth in the Gulf of Mexico. The enormous Chicxulub explosion drove large ...

a huge asteroid struck the Earth in the Gulf of Mexico. The enormous Chicxulub explosion drove large tsunamis throughout the ocean and raised so much dust into the air that it made the dinosaurs ...

Understanding how the Earth and moon formed is important for piecing together the history of the solar system and answering questions like how long planets take to form, what planets are made of, and ...