Skywatchers across the United States can witness the International Space Station (ISS) gliding across the night sky in late July. Visible without special equipment, the ISS appears as a bright, steady ...

Paleontologists have discovered remarkable fossils in the Grand Canyon that reveal fresh details about the emergence of complex life half a billion years ago. The newfound remains of fauna from the ...

Temperate grasslands are savanna-like areas located on every continent except Antarctica. Learn about the animals and plants in this biome.