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Researchers are trying to dismantle the flawed concept of homogeneous racial mixing that has fostered discrimination in Mexico, Brazil and other countries.
Millions of people a year are hospitalized by respiratory syncytial virus and tens of thousands die. After decades of failure, four vaccines are now in late-stage trials.
With a push from students and alumni, the university faced up to a legacy of support for eugenics. As it renames buildings and programmes, can its story serve as a model for others?
In a bid to stave off looming disaster, scientists are trying to repurpose drugs used for malaria and other diseases, but infrastructure and recruitment challenges stymie progress.
A Nature survey reveals that many authors of the latest IPCC climate-science report are anxious about the future and expect to see catastrophic changes in their lifetimes.