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Engravings of Giraffes near Gobero in Niger, ca. 8,000 years old, witness ancient greent times in the desert.Large parts of today s Sahara Desert were green thousands of years ago.
Prehistoric engravings of giraffes and crocodiles testify to this, as does a stone-age cave painting in the desert that even shows swimming humans. However, these illustrations only provide a rough picture of the living conditions. Recently, more detailed insights have been gained from sediment cores extracted from the Mediterranean Sea off the coast of Libya. An international research team examined these cores and discovered that the
layers of the seafloor tell the story of major environmental changes in North Africa over the past 160,000 years. Cécile Blanchet of the German Research Centre for Geosciences GFZ and her colleagues from Germany, South Korea, the Netherlands and the USA report on this in the journal Nature Geoscience.
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The underwater world has never looked so magical, mysterious and mesmerising.
They show just how awe-inspiring Mother Nature can be in aquatic mode - and how fragile she is. And they also underscore the sheer skill and determination of the world s finest underwater snappers, who brave underwater caves and shark-infested reefs to bring us unforgettable pictures, some of which took years to plan.
The overall winner is Renee Capozzola from California, whose picture of blacktip reef sharks cruising beneath gulls at sunset in French Polynesia left the judges jaws on the floor. She triumphed over 4,500 underwater pictures entered by photographers in 68 countries.
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