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Toothed whales represent the diving champions of all air-breathing animals. Sperm whales dive at depths of over 1,200 m (3,600 ft) for more than an hour, while Cuvier's beaked whale (a type of toothed whale) holds the record for diving amongst any sea mammal - 1,900 m (6,330 ft), that translate into 190 atmosphe... |
9 May 2008
04:25 GMT |
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1. Seals are of two types: eared seals (sea lions and fur seals) and true seals (earless seals). Scientists thought the eared seals and walruses had a common origin with bears and dogs from an ancestors that lived on northern Pacific shores, while genuine seals had a common origin with otters, in the northern Atlanti... |
27 February 2008
09:06 GMT |
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The longest migration previously known was that of the Arctic tern (Sterna paradisaea), which nests in the Arctic zone, in the tundra region, and winters in the Antarctica (when there is the Austral summer). Due to this 19,000 km (12,000 mi) journey, the bird sees two summers annually and more daylight than any other... |
30 January 2008
05:47 GMT |
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1.The first cetacean was Pakicetus, which lived 55 million years ago. It was a shore animal with well-developed four limbs. The first dolphins (and toothed whales) are considered the Squalodontidae, which lived 33 to 15 MA years ago. They were 3 m (10 ft) long and had large teeth. There are 32 dolphin species. The sm... |
16 November 2007
18:42 GMT |
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In the first 9 months of our lives, we live like aquatic beings in the womb of the mother. But that's all. After that, the water environment is forbidden for us: we can swim at the surface, but less under water. One famous and remarkable example (but not the only one) are the famous Japanese ama woman divers. Am... |
6 July 2007
15:16 GMT |
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People have been amazed since Antiquity by dolphins' intelligent behavior. 2,000 years ago, the Greek poet Opian said "The dolphins are humans that at the demand of the Dionysus (a Greek god) changed the ground with the sea, taking fish shape". The high intelligence of the dolphins is regarded as a reaction to ... |
8 May 2007
16:07 GMT |
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