Iron is mainly absorbed in the first part of the small intestine, called the duodenum, which resides next to the stomach. Compounds in certain foods you eat can bind to iron and prevent absorption, ...

Voluminous clouds of cosmic dust permeate our galaxy, but only recently has software allowed detailed observations of the ...

Astronomers have uncovered the largest and most distant water reservoir ever detected in the universe. This staggering ...

Fitness trackers detect heart rate by measuring changes in blood volume, which is exactly what we do when we check our pulse. (Image credit: Getty Images) PPG sensors detect these changes in blood ...