"Dust in the atmosphere has a major role in shaping the climate on Mars, " said Manuelde la Torre Juarez of NASA's Jet Propulsion Laboratory in Pasadena, Calif.
"A dust-devil looks essentially like what you would expect from the movies - a tiny tornado that is lifting dust, " explained Manuelde la Torre Juarez of Nasa's Jet Propulsion Laboratory (JPL) and a scientist on the Rover Environmental Monitoring Station (Rems) instrument.
The commentators on Televisao Nacional de Angola were almost too stunned for words, while the Palancas Negra's coach, Manuel Jose, said in a post-match interview that he had no explanation for what had happened on the pitch.