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Genetics

Scientists find new way to corral genetically engineered bacteria

Engineering E. coli to depend on human-made molecules may keep genetically modified bacteria from escaping into nature.

Environment

Atrazine’s path to cancer possibly clarified

Scientists have identified a cellular button that the controversial herbicide atrazine presses to promote tumor development.

Planetary Science

Young asteroids generated long-lasting magnetism

Pockets of iron and nickel in meteorites suggest that asteroids in the early solar system produced magnetic fields for much longer than once thought.

Neuroscience

Brain’s protective barrier gets leakier with age

Aging influences the breakdown of the blood-brain barrier, which may contribute to learning and memory problems later in life.