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An invasive grass causing havoc in Texas and contributing to wildfires packs a one-two wallop against native plants. Guinea grass uses a combination of crowding that blocks out light from growing seedlings and what amounts to a chemical warfare in soil that is toxic to native plants, according to a new study by researchers at The University of Texas at Austin.

Go deep in the heart of science this month and next.

Traditionally, it has been assumed that cultivating food leads to a loss of biodiversity and negative impacts on an ecosystem.

A new study has startling conclusions about how, on smaller islands in the Caribbean where human impact was greatest, extinctions have led to the loss of up to two-thirds of the supports for the ecosystem that native reptile species once provided there.

Nancy Moran receives the Selman A. Waksman Award in Microbiology from the National Academy of Sciences.