Jon Cohen is a correspondent for Science and a freelance writer; his books include Shots in the Dark: The Wayward Search for an AIDS Vaccine. He has covered the HIV/AIDS epidemic in Africa and elsewhere since the early 1990s.
Nearly 1.5 million people die from tuberculosis every year, even though most cases can be cured with routine antibiotic treatments. One country’s fight to get the ancient scourge under control has an unlikely hero: a simple diagnostic test.
A new generation of DNA-sequencing machines is opening up whole new areas of genomic research. Already, researchers are unraveling how modern humans differ from Neanderthals and devising more precise tests for cancer.