FDA warns about a cancer-causing agent in the popular heartburn medication
Climate activism takes center stage
The EPA plans to eliminate some animal testing by 2020
Scientists turn to editing sperm to get around criticism of embryo research
Study attempts to tie homosexual behavior to genetics
Separating fact from fiction about the rainforest fires
A Yale scientist denounces belief in Darwinian evolution
Atmospheric carbon dioxide likely not as catastrophic as UN special report suggests
The international organization can wield influence but not authority
Fossil find complicates theory of human evolution
