News tagged with dolphins
Scientists say dolphins should be treated as non-human persons
(PhysOrg.com) -- Scientists studying dolphin behavior have suggested they could be the most intelligent creatures on Earth after humans, saying the size of their brains in relation to body size is larger than ...
Jan 06, 2010 |
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Rare whale caught on film for first time
Australian researchers Thursday revealed they had filmed a pod of extremely rare Shepherd's beaked whales for the first time ever.
Feb 23, 2012 |
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Same-sex behavior seen in nearly all animals
Same-sex behavior is a nearly universal phenomenon in the animal kingdom, common across species, from worms to frogs to birds, concludes a new review of existing research.
Jun 16, 2009 |
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Ingenious fishing method may be spreading through dolphins
(PhysOrg.com) -- Researchers from Murdoch University believe a recently documented method of fishing may be spreading throughout a population of dolphins.
Aug 24, 2011 |
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Elephants are quick learners, offer helping hand
Elephants quickly learn to lend each other a helping hand - ah, make that a helping trunk.
Mar 07, 2011 |
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Dolphins have ability to sense electrical signals
In a new study published in the Proceedings of the Royal Society B, researchers reveal the discovery of how the Guiana dolphin, Sotalia guianensis, is able to sense electric fields of prey in the water using ...
Jul 29, 2011 |
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Jaws -- 4 million BC
It might sound like a mashup of monster movies, but palaeontologists have discovered evidence of how an extinct shark attacked its prey, reconstructing a killing that took place 4 million years ago.
Other Sciences / Archaeology & Fossils
Mar 16, 2010 |
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New study finds dolphins produce sounds in a similar way to humans
(PhysOrg.com) -- It has long been thought that dolphins produce sounds by means of "whistles," but a new analysis of a data gathered in the late 1970s has revealed that instead, dolphins make sounds by means ...
Sep 09, 2011 |
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Dolphins maintain round-the-clock visual vigilance
Dolphins have a clever trick for overcoming sleep deprivation. Sam Ridgway from the US Navy Marine Mammal Program explains that they are able to send half of their brains to sleep while the other half remains ...
May 01, 2009 |
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Dolphin cognitive abilities raise ethical questions, says Emory neuroscientist
Many modern dolphin brains are significantly larger than those of humans and second in mass to the human brain when corrected for body size, says an Emory scientist. Some dolphin brains exhibit features correlated ...
Feb 18, 2010 |
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Getting a leg up on whale and dolphin evolution
When the ancestors of living cetaceans—whales, dolphins and porpoises—first dipped their toes into water, a series of evolutionary changes were sparked that ultimately nestled these swimming mammals into the ...
Sep 24, 2009 |
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Researchers find rare hourglass dolphin
A rare hourglass dolphin underwent a post-mortem on Friday at Massey's Coastal-Marine Pathology Unit at Albany. It is one of only a handful of carcasses of the species ever examined by scientists.
Sep 13, 2010 |
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The Ichthyosaurs survived longer than was thought
(PhysOrg.com) -- The discovery of a new species of ichthyosaurs considerably changes our understanding of the evolution and the extinction of these dinosaur age sea reptiles, according to a study published ...
Other Sciences / Archaeology & Fossils
Jan 05, 2012 |
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Dolphins' health shed light on human and ocean health
A panel of governmental, academic and non-profit scientists speaking today at the annual meeting of the American Association for the Advancement of Science (AAAS) unveiled research suggesting that diseases ...
Feb 18, 2010 |
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Mercury high in Japanese town that hunts dolphins
(AP) -- Residents of the dolphin-hunting village depicted in the Oscar-winning documentary "The Cove" have dangerously high mercury levels, likely because of their fondness for dolphin and whale meat, Japan's ...
May 09, 2010 |
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Dolphin
Dolphins are marine mammals that are closely related to whales and porpoises. There are almost forty species of dolphin in seventeen genera. They vary in size from 1.2 m (4 ft) and 40 kg (90 lb) (Maui's Dolphin), up to 9.5 m (30 ft) and 10 tonnes (9.8 LT; 11 ST) (the Orca or Killer Whale). They are found worldwide, mostly in the shallower seas of the continental shelves, and are carnivores, mostly eating fish and squid. The family Delphinidae is the largest in the Cetacea, and relatively recent: dolphins evolved about ten million years ago, during the Miocene. Dolphins are considered to be amongst the most intelligent of animals and their often friendly appearance and seemingly playful attitude have made them popular in human culture.
For more information about Dolphin, read the full article at
Wikipedia.
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