Hydroelectric dams on Maine's Penobscot River blocked ancient fish migrations for over a century. Innovative fish passage systems, including a fish lift and eel ladder, reopened the river for ...

Researchers traced tremor signals deep inside Tanzania’s Oldoinyo Lengai volcano, pinpointing their 3D locations for the first time. The study revealed linked tremors at different depths, offering a ...

Mount Etna has long puzzled geologists because it doesn't fit any of the three classic ways volcanoes are thought to form. A new study suggests it may instead be fueled by ancient pockets of magma ...