Geology

Paleoclimate simulations reveal potential 'green corridors' across North Africa

Scientists have long believed that lava erupted from certain oceanic volcanoes contains materials from the early Earth's crust. But decisive evidence for this phenomenon has proven elusive. New research from a team including Carnegie's Erik Hauri demonstrates that oceanic volcanic rocks contain samples of recycled crust dating back to the Archean era 2.5 billion years ago. Their work is published in Nature.

The most severe mass extinction on Earth occurred 250 million years ago, but what's eluded researchers is the specific time when the extinctions happened.

The ancient Roman City of Aquae Sulis is threatened by the process of "fracking".