Runners

Competitors run in the Badwater Ultramarathon in Death Valley National Park

Lucy Nicholson/Reuters

Competitors take part in the Badwater Ultramarathon in Death Valley National Park, California, in temperatures that can reach 55 degrees centigrade

A fighting cow leaps over revellers upon entering the bullring following the first running of the bulls of the San Fermin festival in Pamplona...A fighting cow leaps over revellers upon entering the bullring following the first running of the bulls of the San Fermin festival in Pamplona July 7, 2013. Several runners suffered light injuries in a run that lasted four minutes and six seconds, according to local media.   REUTERS/Joseba Etxaburu (SPAIN - Tags: ANIMALS SOCIETY)

Joseba Etxaburu/Reuters

A fighting cow leaps over revellers upon entering the bullring following the first running of the bulls of the San Fermin festival in Pamplona, Spain, on Sunday. Several runners suffered light injuries in a run that lasted four minutes and six seconds, according to local media Read more