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Home / News / Tags / shark
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A team of researchers from the University of Washington has come up with a group of complex underwater robots that use exactly the same swimming moves as fish to travel through the liquid medium. The robots are not relying on human remote control for their movement process, and are also able to communicate among the... |
31 October 2008
05:42 GMT |
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The second documented case of a female shark bearing a live young without ever being exposed to the presence of a male has recently been recorded. But this doesn't mean that there haven't been such cases before, even though they were not observed and analyzed by specialists. But before all feminist sup... |
10 October 2008
11:17 GMT |
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According to a new report released by the International Union for Conservation of Nature 11 species of sharks around the world are at high-risks of extinction, while another five show a significant decline. The reason is, as usual, over-fishing, which is affecting shark species especially due to their low rates of re... |
23 May 2008
06:14 GMT |
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Sharks are extremely sensitive to electric fields, and this enables them to detect their preys, as all living creatures emit weak electric fields. But this ability of the sharks comes with pros and cons: in captivity, sharks avoid metals reacting with seawater and producing an electric field. In fact, this may be the... |
23 April 2008
03:59 GMT |
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Sharks gained their dominance in the seas owing to their formidable teeth-jaws, speed and senses. For hunting, sharks are endowed with keen sight, olfaction and hearing (they pick up sounds from 2 km (1.2 mi) away). The lateral line helps them detect vibrations produced by a struggle in the water, like the convulsion... |
28 March 2008
07:46 GMT |
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The biology books say that sharks and rays make the group of cartilaginous fish, less evolved than most of the other species, that make the group of the bonny fish. Still, sharks, with their highly developed senses and teeth, make the top predators of the seas. Paradoxically, the two largest species of shark, that m... |
22 March 2008
07:53 GMT |
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Sharks are amongst the least understood creatures. A complex mythology depicting the shark as a mystical animal emerged in many cultures. Polynesian myths and legends talk about Kauhuhu, the shark god, which lives in a deep submarine cave or palace that cannot be seen by anybody. Up to 11 shark-gods are found in the ... |
15 March 2008
07:46 GMT |
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Well not really, because it's still cold outside. But just wait until summer, you'll see then; there will be flies and fly-spies all over the place, you won't be able to make the difference! Just kidding! Well, it seems that science fiction has given some 'mad' scientists new ideas, not that ... |
10 March 2008
12:22 GMT |
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It is difficult to trigger the sympathy of the audience with a giant conical head, a set of huge razor sharp serrated teeth, a carnivorous appetite, a malicious grin and a reputation of "man-eater". The slightest encounter with people is enough to fill the headlines. 1.With a strong rocket-like body, up to 7.2 m (24 ... |
4 December 2007
14:06 GMT |
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This is a 290 million years old Russian doll, on a pattern shark-amphibian-fish. An extraordinary fossil preserved both the predator's last meal, and also the last meal of the prey, in a period long before the emergence of the dinosaurs, being the oldest snapshot of a vertebrate food chain, described in a new re... |
9 November 2007
04:01 GMT |
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Perhaps most of the things that we know about sharks come from the movies and documentaries presenting the terrible great white shark and the reef sharks. What else?1.Generally, sharks are carnivorous, eating from sea urchins to mollusks (including squids and octopuses), sea mammals (seals, dolphins and whales), sea ... |
9 October 2007
17:16 GMT |
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It's not so hard to be a hacker these days. You don't have to be a geek to know a lot of script. Now, hackware has a nice interface and even comes with support! I guess that the hardest part is to get inside one of these communities because then you can simply buy the software and with so many sites and use... |
4 September 2007
09:26 GMT |
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This is the most dangerous and spectacular predatory fish: with a strong rocket-like body, up to 7.2 m (24 ft) long and up to 3.4 tons heavy, the white shark can kill from fish (sharks included) to large seals and dolphins. Swimmers and surfers (and sometimes even boats) have no chance. Now a digital analysis of a gr... |
3 September 2007
03:26 GMT |
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You may have heard about cats with "wings", two-headed tortoises, snakes, piglets and even humans, extra-limbed lambs, pigs, deer, cows or humans, but this is far odder: a footed shark. This is extremely weird as sharks do not have and never had feet in their whole evolution. Maybe one day, the Great White will be ru... |
15 August 2007
13:51 GMT |
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With a strong rocket-like body, up to 7.2 m (24 ft) long and up to 3.4 tons heavy, the white shark hunts from fish (including other sharks) to seals and dolphins. They can suddenly attack swimmers, surfers or boats, sinking them, but humans do not seem to represent their favorite dish. They bite once and release the ... |
1 August 2007
14:31 GMT |
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Sharks have pervaded the Earth for over 450 million years, before any plant or animal got out of the water and colonized the terrestrial surface. Now they face extinction due to a human caprice: fin shark soup. This dish could cause extinction within a generation due to overfishing for their fins, has signaled on We... |
19 July 2007
06:15 GMT |
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There are more and more mysteries about the sharks' reproductive abilities, besides the already known facts, like the double penis and the siblings' intrauterine cannibalism. Recently, the first case of asexual reproduction (parthenogenesis) among sharks has been documented, a hammerhead female shark at a N... |
26 June 2007
06:10 GMT |
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Mystery is what some of us live for. I will not get psychological or philosophical on you, but curiosity is the most precious thing that humans have... the need that drives them to know more and automatically to learn more...Anyway, going back to our problem, for this week's game, the issue is still "mystery". W... |
22 June 2007
10:43 GMT |
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Indeed, sharks possess amazing traits. They are believed not to develop cancer. As they lack blood vessels in cartilage, preclinical studies were made on them supporting the idea that they may contain inhibitors of angiogenesis (blood vessel formation), as cancer cells feed themselves by angiogenesis. But the first ... |
4 June 2007
04:14 GMT |
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Just a drop of blood and the place is infested with sharks: these fishes are famous for their keen sense of smell. But a new investigation made by Boston University marine biologists reveals that sharks use not only their nose in detecting the smell of their prey; they also use their skin, more precisely their latera... |
30 May 2007
03:01 GMT |
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Sharks have many issues of their own in the reproductive domain, from double penis in case of males to intrauterine cannibalism. Now, another odd trait adds to their reproductive peculiarities: female sharks can give birth without fertilization. The new mix Northern Ireland-U.S. research investigated the DNA of a ham... |
23 May 2007
12:56 GMT |
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These efficient killers have not changed since the dinosaur era. They present sophisticated sensory organs yet scientists believed sharks and their relatives, rays (which are nothing more than flattened sharks) are color-blind. Now a team at University of Queensland has revealed that stingrays could be able to see i... |
11 April 2007
08:37 GMT |
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What's the link between the fin soup and paella?Well, less big sharks in the oceans means no scallops and other sea food. A new Canadian-American team, led by world-renowned fisheries biologist Ransom Myers at Dalhousie University, has discovered that overfishing the largest predatory sharks, like the bull, grea... |
30 March 2007
08:51 GMT |
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A five years survey on local fish market in Indonesia led to the discovery of at least 20 previously unknown species of sharks and rays by an Australian team. Indonesia is the world's most extensive archipelago, with more than 17,000 islands, located in a tropical climate and regarded as possessing the highest d... |
3 March 2007
04:12 GMT |
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