Zoology: Shark skin (acanthias acanthias). Scales from the skin of a shark. These sharply pointed placoid scales are also known as dermal teeth or denticles. They give the shark’s skin the feel of sandpaper. The tip of each scale is made of dentine overlayed with dental enamel. The lower part of each scale, which anchors it into the skin, is made of bone. The scales disrupt turbulence over the skin, considerably reducing the drag on the shark as it swims. This design has been investigated by engineers for use on the surfaces of aircraft and boats. Vespidae, vesp (vespa crabro). The European hornet is the largest of the European wasps. The head has two antennae, branching to left and right from between the two compound eyes. The biting jaws (mandibles) are below the eyes. The six legs and the wings are attached to the thorax, the part of the body behind the head. There are two pairs of wings, but they are joined together and look like a single pair of wings.
- Pics and Vids
AN unborn elephant, perfectly formed in every way. A dolphin swimming in the womb, just as it will have to swim in the ocean the moment it is born. An unborn dog asleep as if by its master’s side. Using new technology, these images, published in UK’s Daily Mail, reveal what until now has been a secret – exactly how animals develop in the womb. They were created by the same team who in 2004 showed how human embryos “walk in the womb”. Using a combination of three-dimensional ultrasound scans, computer graphics and tiny cameras, the team were able to show the entire process from conception to birth. “These kind of images from inside animals have never been seen before,” Jeremy Dear of Pioneer Productions, who made the film, told The Daily Mail. “We worked with dozens of zoos and animal sanctuaries across the world. There were a lot of different challenges – recording a dolphin is very different from an elephant, for instance. “Animals were trained to sit still near the scanners and we also inserted cameras into the womb via the elephant’s rectum-But it has been worth it. It one sequence we follow an elephant developing. When it […]