Why did vertebrates conquer both the land and the air before the depths of the sea?
A feud between the revolutionary group MOVE and Philadelphia officials reached a bloody culmination.
Galaxies older than the universe? Webb's findings keep defying our best explanations.
Long-extinct dinosaurs may still haunt us—possibly driving us to age faster than any vertebrate.
Earth's core: solid or liquid? Yes — we know more about distant galaxies than our own interior.
Only twice in Earth's history have supermountains risen, and both times reshaped life forever.