Dr Stefan Mindea spoke to The Mirror about the life-cycle of human brains, how they take decades to mature and what happens ...

In population dynamics, there is an "echo effect". Today's aging population is the echo of a long period of low fertility ...

All plants and animals follow the life cycle of their species. Some are short and some are long. Some species of butterfly live for just a few hours, while a human being's life cycle can last for ...

A life cycle is the series of stages something passes through during its lifetime. We also use the term for things that are not living, like cell phones. The life cycle for anything you buy includes ...