The Huashan rock paintings, declared a UNESCO World Heritage Site in 2016, stretch over 260 kilometers along the Zuojiang River valley, in the Guangxi Zhuang Autonomous Region of southern China. More than 80 sites with human figures, animals, and bronze objects decorate cliffs that rise dozens of meters above the water. Created at least 2000 […]

A population study suggests the human body may already be responding to changes in the composition of the atmosphere. The air outside may be leaving a subtle signature in human blood. Researchers have identified gradual changes in a key carbon dioxide-related blood marker and warn that it could approach the upper limit of its healthy [...]

A new evolutionary analysis suggests that modern blood and immune cells may preserve a 700-million-year legacy inherited from ancient single-celled ancestors. Long before humans, dinosaurs, or even fish existed, ancient single-celled organisms may have already carried the genetic blueprint for one of the body’s most important systems: blood. A new study from Kyoto University suggests [...]