Ships have evolved a great deal throughout history: they are faster, sturdier and more reliable, but there is one thing that hasn't changed from the early ages of the ship concept, and that's the anchor, the rudimentary system that holds a ship in one place. But the very heavy metal piece which has been aro... |
3 December 2008
04:19 GMT |
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1. There are 80,000 species of living mollusks, classified in Gastropoda (snails and slugs), Bivalvia (clams, oysters and scallops), Cepahlopoda (squids, cuttlefish and octopuses), Scaphopoda, Polyplacophora (chitons), Aplacophora, Monoplacophora, Caudofoveata. Because most mollusks have hard shells, many were fossil... |
25 January 2008
17:31 GMT |
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When we talk about longevity, our minds think about giant tortoises and crocodiles, elephants and other animals.Indeed, crocodiles can live as much as human beings and elephants do, also reaching the sixties. Giant tortoises are proved to live more than 200 years. And some ravens and parrots indeed live longer than o... |
29 October 2007
15:06 GMT |
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A dead zebra in the African savanna means a fiesta for the vultures around. But if we're talking about dead whales, this fiesta can last for decades. And there are specialized marine communities which are adapted for this purpose. This is called whale fall and the first recognized one was in 1989 in southern Ca... |
21 September 2007
05:03 GMT |
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The most famous mass extinction is perhaps that of the dinosaurs, 65 million years ago. The current man made extinction could be even worse. And several mass extinctions occurred along the geological eras. But the dinosaur extinction could be a minor event compared to what the clumsy snails and clams did 250 million ... |
31 July 2007
03:43 GMT |
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