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July 10th 10 Jul 2011 | 07:00 pm
July 10th Birds also have several adaptations which help them fly by reducing their weight. Bird’s bones are hollow, unlike the solid bones of other vertebrates, and are supported by lightweight inte...
July 9th 9 Jul 2011 | 07:00 pm
July 9th Amphibians and most reptiles have a three-chambered heart, in which blood returning to the heart from the body and from the lungs mixes together. Birds, on the other hand, have a four-chambe...
July 8th 8 Jul 2011 | 07:00 pm
July 8th You’ve seen the old videos of early attempts at flight, such as the clumsy bicycles attached to flapping wings which bounce around before finally crashing, never leaving the ground. Successf...
July 7th 7 Jul 2011 | 07:00 pm
July 7th The amniote egg is a trait that reptiles share with our next group of animals, the birds. Birds have traits reminiscent of reptiles in many ways — in addition to laying eggs, they have scale...
July 6th 6 Jul 2011 | 07:00 pm
July 6th Reptiles typically lay these eggs in buried nests — one of the most endearing examples is the thousand-mile journeys of sea turtles to lay their eggs on the same beaches, generation after ge...
July 5th 5 Jul 2011 | 07:00 pm
July 5th The reptilian egg is surrounded by a waterproof shell, which retains moisture inside the egg but allows for some gas exchange with the surrounding environment. Unlike the rigid shell of bird...
July 4th 4 Jul 2011 | 07:00 pm
July 4th Many of the reptilian features we have seen have given the reptiles the ability to be more independent of water than their amphibian cousins. There is one remaining reptilian feature that es...
July 3rd 3 Jul 2011 | 07:00 pm
July 3rd The final group of reptiles are the tuataras, a group which contains only two living species, which inhabit isolated islands in New Zealand. Tuataras resemble lizards, with four legs and a t...
July 2nd 2 Jul 2011 | 07:00 pm
July 2nd Alligators and crocodiles represent one of the most primitive lines of reptiles. These animals are aquatic predators, adapted for rapid and stealthy movement in the water and lightning-fa...
July 1st 1 Jul 2011 | 07:00 pm
July 1st Turtles and tortoises are those reptiles which are characterized by their shells. The shell grows as an extension of the animal’s vertebral and ribcage structure, and provides protection for...
