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November 1999Sea-tides result from the Earth's rotation on its axis and the attraction of the moon and the sun on the ocean's water masses.
November 1999Sandy soils constitute the cover of immense areas in the arid and semi-humid tropics.
October 1999The Amazon Basin covers an immense area (more than 6 million km2, 5% of Earth's exposed landmass).
October 1999As many data from fisheries around the world show, sardines and anchovies hardly ever coexist in great numbers simultaneously in the same area of the sea.
October 1999In the course of studies conducted in South-East Senegal, in and around Niokolo Koba National Park, two primatologists from IRD (Institut de recherche pour le développement, formerly ORSTOM) have made a surprising discovery: in the dry season, although there is water available in the form of ...