To curb a dengue-carrying mosquito, L.A. County officials are releasing sterilized males. The approach is promising, but ...

This natural phenomenon has an 80% chance of occurring in autumn, raising global temperatures and triggering extreme events in many parts of the world.

As fears of a global nuclear war mount, decades of science is helping to paint the grim picture of what would happen after the bombs dropped. The results may be worse than the war.