On June 10, 1854, Georg Friedrich Bernhard Riemann gave his classic lecture on curved space. [‘On This Day in Space’ Video Series on Space.com] Riemann was a 19th century mathematician from Germany.

Scientists and engineers don’t always dance to the beat of the same drum, especially when it comes to “hard rock” science — the study of intact, crystallized rocks on other planets, which may provide ...

Time is the strange dimension: Unlike its spatial siblings, it is a one-way street as the clock only ever ticks forward and never backward. Scientists have long been aware of time's quirks, with the ...

In the second lecture, Kevin explores life in orbit on board the International Space Station. As Tim settles in to his new home he sends special reports about what it takes to live and work in space.

Includes notes on time and space categories and "The Anthropology of Time Reckoning" by David F. Pocock. Audiovisual and digital materials are restricted. Please contact the archives for information ...