In the mid-19th century, a microscopic invader swept across Ireland, leaving a trail of devastation in its wake. The potato blight, caused by the fungus-like pathogen Phytophthora infestans, triggered ...

Over thousands of years, evolution has helped the Aymara people of the high plains of Andes mountains adjust to altitudes as high as 14,400 feet (2.75 miles) above sea level. This indigenous ...