How much sleep do I need? Why you can forget the eight‑hour sleep rule
For decades, the answer to "how much sleep does an adult need?" has been simple: eight hours. The idea dates back to the mid-19th century, when the notion of eight hours of work, eight for recreation and eight for sleep first took hold.
We haven't written up this one. Medical Xpress has the full story — the link below goes straight to it.