WASHINGTON - MORE than 2 trillion tonnes of land ice in Greenland, Antarctica and Alaska have melted since 2003, according to new Nasa satellite data that show the latest signs of what scientists say is global warming.

More than half of the loss of landlocked ice in the past five years has occurred in Greenland, based on measurements of ice weight by Nasa's GRACE satellite, said Nasa geophysicist Scott Luthcke.

SAN FRANCISCO - NOWPUBLIC on Tuesday declared 'crowd-powered' news reports of terrorist attacks in Mumbai as a climactic moment in a year in which citizen journalism proved its mettle.

LOS ANGELES - OBSERVATIONS from the international Cassini spacecraft suggest Saturn's largest moon may have active or recently active ice volcanoes.