We don't have to go very far back in time to an age when the city's streets were unlit and unpaved, livestock roamed freely, ...

We hadn't seen this Return of the Jedi race in 41 years... and now they've turned up twice in the last year. George Lucas ...

By digitally modeling muscles and tendons for the skeleton of Lucy (Australopithecus afarensis), researchers determined that our hominin ancestors could run well but topped out around 11 mph.