On 15 November 2007, a category 4 cyclone, called Cyclone Sidr, came ashore in Bangladesh. Wind speeds reached 225 km/h; some waves were eight metres high. More than 3200 people died. Bangladesh is a prisoner of its geography. Three rivers, the Brahmaputra, the Ganges and the Meghna, rise in the Himalaya mountains before they converge […]
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Mapping Earth’s Gravity
A new model of the Earth’s gravitational field may help climate change researchers and geophysicists better understand our planet. The detailed model is based on the European Space Agency’s GOCE satellite data. The satellite, which was launched in 2009, flies at a low altitude of 254.9 km. The low orbit makes the satellite more […]