Marcia Bjornerud

Ancient currents seemed to move in concert with a 2.4 million-year dance between the Red Planet and Earth.

Scientists have long puzzled over the behavior of mixed particles in rivers and landslides. New clues could be groundbreaking.

A geological discovery shows how carbon was captured to chill the planet.

How historic records and new data uncovered the colossal underwater avalanche that unleashed a massive wave in 1650.

Contrary to conventional wisdom, matter can escape the center of the Earth.

Today’s mammals would not survive the heat of Earth’s next supercontinent. But in evolution, there’s hope.

A scientist tells us how her field instills timefulness.