The single-celled parasite Entamoeba histolytica infects 50 million people each year, killing nearly 70,000. Usually, this ...

Nearly four decades after the Chernobyl disaster, the remnants of Reactor No. 4, especially the Elephant’s Foot—a dense, ...

A study of more than 3,000 genomes has traced a gene mutation that confers HIV resistance to a person who lived near the ...