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Articles by Valerie Brown
Creature
The Mysterious Microbes That May Explain What Happened When Life Became Complex
Microbiologists are debating how a group of ancient microbes fits into the emergence of the first complex organisms.
Valerie Brown, Contributor
Technology
Plutonium and Its Discontents
For 75 years, scientists have been trying to devise a way to make a vast supply of radioactive and chemically dangerous waste at the Hanford Nuclear Reservation safe.
Valerie Brown, Contributor
Technology
Device to Detect Pesticide Residue on Produce May Soon Be Available
An inexpensive handheld sensor may simplify testing for pesticides on fruits and vegetables – but won’t replace government monitoring.
Valerie Brown, Contributor