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Physics

Short-lived particle questions long-lived theory

In sifting through the ashes of a short-lived subatomic particle called the kaon, physicists are slowly accumulating new hints that the theory of elementary particles might one day have to be modified.

Chemistry

FBI reveals more details of anthrax investigation

A panel of scientists involved in the anthrax investigations released new details.

Animals

I, Magpie

Some magpies recognize themselves in mirrors, indicating that a basic form of self-recognition evolved in one family of birds.

Earth

Carcinogens from car exhaust can linger

Free radicals similar to those in cigarette smoke may form when car exhaust cools off, and may persist indefinitely in the air.