ניווט נגישות
כתבות אחרונות מאתר 'Phys'
Phys

Wildlife populations have declined 73% since 1970—but many of the world's animals still aren't being counted‎

Wildlife populations around the world have declined by an average of 73% since 1970. That's according to the WWF's new 2026 Living Planet Index—a major estimate, updated every two years, of the changing state of nature. This does not mean that 73% of the world's animals have disappeared. Rather, it is the average decline in the size of wildlife populations being monitored.

03:47
תפריט כתבה
Phys

'DNA Typewriter' records cells' history in developing mouse embryo‎

Scientists have succeeded in reconstructing the family tree of cells in a developing mouse embryo. They recorded cells' relationships, starting when the fertilized egg first split in two and ending after the body and its organs took shape. That period lasted 13.5 days. (Full gestation in mice is 19 to 21 days.)

01:47
תפריט כתבה
דיווח על כתבה זו הסתרת כתבות מאתר זה המשך קריאה באתר המקור