The air on Venus is about 96.5% carbon dioxide, a potent greenhouse gas. All that CO2 leads to a runaway greenhouse effect ...

Venus is often called Earth's "sister planet" because of their similarities in size, mass, and composition. Both are rocky worlds that formed about the same time in the inner solar system; however, ...

The Mount St. Helens eruption anniversary prompts investigation into the California earthquakes: eruption history, threat levels.

South Africa has no dormant volcanoes. Unlike Mount Kilimanjaro or Mount Fuji, which could erupt again, South Africa’s mainland volcanoes are simply too ancient. Their underground systems cooled ...

Olympus Mons, a shield volcano on Mars, is the largest volcano in the solar system, measuring approximately 370 miles in diameter and 26 kilometers in height. The formation of Olympus Mons and three ...

New research presented at the Europlanet Science Congress 2025 in Helsinki suggests that Venus may be concealing some of the largest lava-carved tunnels ever discovered in the solar system. The ...

“ Maui Nui in its heyday, about 1.2 million years ago, encompassed about 5,640 square miles, larger by 50% than today’s Big ...

HONOLULU — Hawaii’s Kilauea volcano resumed erupting Friday by shooting an arc of lava 100 feet into the air and across a section of its summit crater floor. It was Kilauea’s 31st display of molten ...