• Rough and Smooth Lava

    The surface of lava can appear smooth, rough, jagged, and sometimes like a pile of construction rubble. What are the stories behind these surface features and how did they form?

Ask An Earth and Space Scientist

Ask An Earth and Space Scientist is an educational resource for students, teachers, parents, and life-long learners. We encourage anyone interested in earth and space to make use of its content.

Oxygen in the atmosphere

Today, the air we breathe has lots of oxygen – over 20 percent! But that wasn’t always the case.

Meteorite vs asteroid

Meteorites are rocks from space, often from asteroids, Mars, or even the Moon. Join us on a journey through space and time, as we explore meteorites.

Rough and Smooth Lava

The surface of lava can appear smooth, rough, jagged, and sometimes like a pile of construction rubble. What are the stories behind these surface features and how did they form?

Cartoon of a radio satellite in space

If humans discovered aliens, what would they look like? And where would we find them?