Stories by Tim Beardsley

DNA identification is called into question

Sulfate pollutants may slow daytime warming

Drugs that turn off genes are entering human tests

A bioreactor grows cells that resemble real tissue

Advice about science is being heard in the administration

Bright future for a new photovoltaic cell

Could AIDS really be an autoimmune disease?

Who will have the right to examine your genes?

Who's controlling the world's largest nuclear arsenal?

Ecologists seek better data on extinction

NASA wants to fend off doomsday asteroids

A peace accord in the seed wars

Picosecond photography may reveal tumors

Researchers are closing in on the stem cell

How do very similar genes produce very different cells? It depends on which genes are activated and when. The elaborate chemical messages that control differentiation are now being deciphered.

Encouraging results in the search for an AIDS vaccine

Is more oversight needed to curb scientific cheating?

It'll take more than rain to end California's water woes

Do personality tests pick out bad apples?

Policies on global warming and energy don't move critics