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 A tsunami warning along coastal Alaska - which was later rescinded - sent some residents to higher ground.

The book called "The Jupiter Effect" suggested an alignment of planets in 1982 would cause earthly catastrophes, including a great earthquake on California's San Andreas Fault. There's another planetary alignment, of sorts, going on now. Will it cause volcanic eruptions? Charts, and info, from Guy Ottewell.

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.

Katahdin Woods and Waters National Monument in Maine was certified as a Dark Sky Sanctuary on May 8, 2020.

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.

A young volcanic island in the western Pacific Ocean has been going through a vigorous growth spurt since mid-June 2020.

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.

SlothBot is a slow-moving and energy-efficient robot that can linger in the trees to monitor animals, plants, and the environment below.

See the winners of the International Dark-Sky Association (IDA) 1st annual photography contest.