News

Earth

Bt corn pollen can hurt monarchs

A second test of a strain of corn genetically engineered to make its own insecticide finds potential for harm to monarch butterfly caterpillars.

Ecosystems

Virtual skylarks suffer weed shortfall

A new mathematical model raises the concern that switching to transgenic herbicide-tolerant crops could deprive birds of weed seeds.

Archaeology

Maya palace suddenly expands

Archaeologists find a sprawling palace and other surprises at a 1,300-year-old Maya site in Guatemala.

Humans

Postdocs warrant more status and support

A new study finds a pressing need to improve the pay and status of postdoctoral scholars.