A study suggests the first of seven key pyramids in Egypt, the Step Pyramid of Djoser, was built using a hydraulic lift. Dated to about 4,500 years ago, this would move up the introduction of major ...

The human heart has a limited capacity for self-repair because, unlike most other cells, cardiomyocytes do not regenerate. Therefore, if a substantial number of myocytes is lost after a myocardial ...