Sickled cells can obstruct the tiny blood vessels in the retina, the light-sensitive tissue at the back of the eye. This blockage reduces oxygen supply (ischaemia) and can result in retinal damage or ...
Hidden beneath the dunes, a mysterious creature glides through the sand. This is not one of the giant worms of Arrakis in Frank Herbert's sci-fi epic, Dune. Rather, it's an enigmatic and tiny mammal ...