Steve Trash Science is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet, Roku, Samsung Smart TV, ...

Learn about the atmosphere, its five distinct layers, and why this gaseous shield is essential for life. Explore facts about Earth’s air and its composition. The planet Earth is covered by a huge ...

Research partly conducted at the Advanced Photon Source helped scientists discover the composition of Earth's first atmosphere. What they found raises questions about the origin of life on Earth. A ...