How we worked out when whales first evolved asymmetrical skulls.

A long-standing question has been how fast Earth’s magnetic field can change. The authors of a new study say they’ve uncovered some answers.

The quake happened around 10:15 p.m. Tuesday night, according to clocks in Alaska. A tsunami warning along coastal Alaska – which was later rescinded – sent some residents to higher ground.

Earth’s previous polar reversal happened 780,000 years ago. Are we facing another one soon? Hear from the authors of a new study, on a strange anomaly that might be a clue.

The colossal iceberg that split from Antarctica’s Larsen C ice shelf in July 2017 is now in the open waters of the South Atlantic, about 650 miles (1,050 km) from its birthplace.

Researchers suggest 110-120 million year old fossil footprints were made by ancient crocodiles that walked on 2 hind legs about the same length as adult human legs.

Explosive volcanic eruptions are possible deep down in the sea – although the water masses exert enormous pressure there. An international team reports how this can happen.

Waterspouts are essentially tornadoes that form over water. They can and do form over all the world’s oceans. In the U.S., they’re most common near the Florida Keys and in the Gulf of Mexico.

A firefly’s familiar glow is caused by a chemical reaction. Explanation here, plus many wonderful firefly photos.

A massive Saharan dust plume is moving into the southeast US, bringing technicolor sunsets and suppressing tropical storms.