Cocoa clue to reversing memory lossBioactive ingredients found in cocoa sharply reversed age-related memory decline in a group of volunteers, scientists reported.
Partial solar eclipse sweeps across North AmericaA partial solar eclipse swept across much of North America, triggering floods of blurry pictures of a crescent-shaped sun on Twitter and other social media.
Comet Siding Spring whizzes past MarsA comet the size of a small mountain whizzed past Mars, dazzling space enthusiasts with the once-in-a-million-years encounter.