Henrietta Lacks's immortal cancer cells, and the ethical controversy surrounding them.
An unusual virus could be the source of a mysterious form of hepatitis that causes liver failure in most horses.
If you thought mating in humans was complicated, spare a thought for the protozoan Tetrahymena thermophila, with its seven sexes!
Could the mysterious 'fairy circles' in Africa be the result of termites, rather than alien landing pads?