Starfish, sharks and space-telescope selfie – The month’s sharpest science shots, selected by Nature’s photo team
Mathematical doodles.showcases the contents of the late cosmologist Stephen Hawking’s office. This heavily graffitied blackboard is one of the objects on display. Hawking kept it as a treasured souvenir of an international conference he organized in Cambridge, UK, in 1980. Participants doodled equations, cartoons and jokes all over the blackboard. Some of the scribbles refer to the name and nationality of co-organizer Martin Roček; others depict creatures named after mathematical tools..
. It isn’t taking selfies just for fun — this feature helps to check mirror alignment. The bright segment is pointing at a star, and the others are not in the same alignment.