Sap is the sticky substance you see oozing out of tree trunks, and many varieties are edible. Here's what to know about eating sap, plus the risks and benefits.

Cancer and ageing appear to represent the failure or success, respectively, of vital tumour-suppressor mechanisms that rely on the activities of telomere shortening and the activation of the ...

Pluripotent stem cells are cells that have the capacity to self-renew by dividing and to develop into the three primary germ cell layers of the early embryo and therefore into all cells of the adult ...