Being overweight more than doubles the risk of bowel cancer in people with a certain gene disorder, but a regular dose of aspirin can reverse the trend.
Medical marijuana shows some effectiveness in helping treat chronic pain but there is less evidence of its success in warding off nausea or helping ill patients gain weight.
A new device that can be added to a smartphone may be able to accurately and cheaply diagnose cancer, a technology which could be useful in remote areas.
Coffee is gaining ground among medical experts who say it can protect against heart disease, Parkinson's, Alzheimer's and diabetes, even if it is decaffeinated.
Gene sequencing of Galapagos Island finches first studied by Charles Darwin have found the birds have a traceable evolutionary history going back two million years.