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Nowadays, the seas belong mainly to fish and sea mammals. But during the Mesozoic time, the sea was a reptilian realm. There are very few reptiles living in the sea now compared to the times of the dinosaurs. 1.Today, there are seven species of sea turtles. They appeared during the Jurassic period (200-150 Ma ago), t... |
21 April 2008
11:26 GMT |
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Today, only five groups of reptiles still exist: chelonians (turtles and terrapins), Sphenodontia (the tuatara of New Zealand), lizards, snakes and crocodilians (crocodiles, alligators and caymans). (there is also a recently recognized group related to lizards and snakes, Amphisbaenia). They are relict groups (except... |
18 April 2008
16:11 GMT |
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Turtles are grandmas amongst present-day reptiles. And it's not only about their slower movements. They appeared 250 Ma ago, before snakes, crocodiles and dinosaurs emerged. But even the oldest known turtles already had a well developed shell. Modern turtles differ a lot from those early ancestors, but many rush... |
14 March 2008
04:56 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.There is a whole order of fish, comprising 18 families, called anglerfish. The first spiny ray of the dorsal is located on the head and transformed into line and esca (bait), aimed for attracting prey to the mouth, imitating small marine creatures making the fish's food. The most famous fish of this order be... |
12 January 2008
08:53 GMT |
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Living trapped in a bony shell must be tough. But what if you fall on your back? For a turtle, this is impossible not to happen, as males fighting for females often flip their adversaries on their back. Still, this may not kill the animal, as it will get on its feet on its own. A new research solved the mystery: it&#... |
29 October 2007
05:16 GMT |
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Two-headed reptiles appear from time to time. But this two-headed turtle discovered by a turtle collector is an extremely rare example of a conjoined-twin birth. "The turtle would have likely died in the wild because it swims awkwardly and would be an easy target for predators," said Jay Jacoby, manager of Big Al... |
8 October 2007
15:36 GMT |
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Sea turtles have puzzled the scientists since…ever. It is especially the case of the green sea turtles (Chelonia mydas), gentle offshore sea grass eaters, which got their name from their greenish meat and fat, once used for soup. Thousands of sea-turtle hatchlings head towards the sea and after that…total mystery. Yo... |
21 September 2007
05:36 GMT |
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Scientists have been puzzled for long by the ability of the marine turtles to return their entire life to the same beach to depose their eggs. These egg-laying sites can be often located far from the feeding areas and the individuals (both females and males, as they mate in the same area where the females lay their e... |
8 March 2007
07:21 GMT |
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