Collecting donor stem cells used to require surgically removing marrow from a bone, usually in the hip or sternum, with a needle and syringe. Now, donors can take a drug that releases stem cells from ...

Ribs are crescent-shaped bones that protect the vital organs of ... known as "true ribs," are attached directly to the ...

The older the person at death, the more pitted and craggy these bones will be. Forensic anthropologists will compare this against a database of standard markers to learn the age of the skeleton.