The authoritative guide to ensuring science and technology make life on Earth better, not worse.

groundwater contamination

A toxic grass that threatens a quarter of US cows is spreading because of climate change

By Robert Langellier | Climate Change

crater left over from underground nuclear test

Environmental impacts of underground nuclear weapons testing

By Sulgiye Park, Rodney C. Ewing | Nuclear Risk, Nuclear Weapons, Special Topics

Watch the 2025 Doomsday Clock announcement on January 28