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Alex covers Earth and planetary sciences, with a little dabbling in astronomy. She studied geology at the Massachusetts Institute of Technology and science communication at the University of California, Santa Cruz. Among other places she has worked as a journalist for Science News and the Dallas Morning News; she also ran Nature's US news operations from Washington DC between 2005 and 2010. Alex rejoined the journal in 2013.As the mission speeds towards its conclusion,Naturetakes a look at what researchers have learnt about the planet's moons, rings and tempest-filled skies.