In the crash-car derby between heavy and light isotopes vying for the coolest spots as magma turns to solid rock, weightier isotopes have an edge: momentum. The research may offer clues to how igneous rocks form.

Scientists have recently described the deepest terrestrial animal ever found, together with four new species. These animals are springtails (Arthropoda, Insecta, Collembola), a minute primitive wingless insect with six legs and without eyes that live in total darkness.