"After I snapped this picture, the hawk spotted a large grasshopper a few yards behind me and alighted. As it flew by me, its right wing brushed against my face." Sulloway, a historian of science ...

A pair of critically endangered, nearly 100-year-old Galapagos tortoises at the Philadelphia Zoo have become first-time parents. In an announcement Friday, the zoo said it is “overjoyed” at ...