The Mystifying Case of the Missing Planets
There's a puzzling lack of planets slightly bigger than Earth, which is making astronomers rethink how planets form in the first place.
Exploding Stars May Have Killed Off Prehistoric Predators
Subatomic particles streaming through the atmosphere could have fatally irradiated ancient megafauna like the megalodon monster shark.
Dark Matter Hunters Are Looking Inside Rocks for New Clues
Dark matter may occasionally interact with minerals in the earth, leaving traces that physicists hope to decipher.
How Are Planets Made? With Very Little Stuff, It Seems
Exoplanets are far more massive than the material they're made of. New evidence suggests our planet-building theories are incomplete.
3.5 Billion-Year-Old Fossils Challenge Ideas About Earth’s Start
A series of fossil finds suggests that life on Earth started earlier than anyone thought, calling into question a widely held theory of the solar system’s beginnings.