Stories by Tim Beardsley

Retinoic acid turns off a form of leukemia

The EPA tries to decide if there's harm from ELF

Living near power reactors may not add cancer risk

Vitamin A and its cousins are potent regulators of cells

Does margarine really lower cholesterol?

Robert Gallo toughs out controversy

Nutritionists earn the right to know

Cystic fibrosis may be treated with gene therapy

Roger Revelle started the world thinking about global warming

An old volcano teaches ecologists some new tricks

Artificial evolution creates proteins nature missed

Trouble with Hubble puts heat on NASA

W French Anderson pioneers gene therapy

A human dementia raises the stakes in mad cow disease

Electromagnetic fields stimulate genetic activity

The space telescope launches a new era in astronomy

The heat is on Gallo—again

Can NASA get us to the red planet?

Darwin survives as the debate evolves

New radiation-risk estimates prompt calls for tighter controls

Ideology seems to have put some medical advances on hold