"This is probably the only definitely habitable environment that we've described and recorded, " said Paul Mahaffy, principal investigator for Curiosity's Sample Analysis at Mars investigation at NASA's Goddard Space Flight Center.

CNN: NASA: Yes, Mars could have hosted life

The swimmer who, under her maiden name Michelle Smith, won three gold medals at the 1996 Olympic Games, is under investigation by International Swimming Federation after it said the doping sample taken in November last year showed clear signs of contamination.

BBC: Irish swimmer denies drugs claims

Its investigation focused on 600 of the most serious complaints, and a sample audit of suspect votes at 3, 377 polling stations.

BBC: Afghan election goes to run-off