Off the Food Grid. Richard Lazzara - #TethysSeaSalts. Dolphins Can Call Each Other, Not by Name, But by Whistle. Every bottlenose dolphin has its own whistle, a high-pitched, warbly "eeee" that tells the other dolphins that a particular individual is present.
Dolphins are excellent vocal mimics, too, able to copy even quirky computer-generated sounds. So, scientists have wondered if dolphins can copy each other's signature whistles—which would be very similar to people saying each others' names. Now, an analysis of whistles recorded from hundreds of wild bottlenose dolphins confirms that they can indeed "name" each other, and suggests why they do so—a discovery that may help researchers translate more of what these brainy marine mammals are squeaking, trilling, and clicking about. "It's a wonderful study, really solid," says Peter Tyack, a marine mammal biologist at the University of St. Andrews in the United Kingdom who was not involved in this project. Scientists discovered the dolphins' namelike whistles almost 50 years ago.
Male A Male B Copying Male A Male B. Walking with Beasts : Whale Killer - Episode 2. 180,000-Year-Old Mutation Allowed Humans to Become Vegetarians and Move Out of Africa : Science/Tech. Early humans were able to move from Africa after a single genetic mutation allowed them to become vegetarians, scientists claim.
The switch, which allowed humans to process vegetables, meant that humans were able to move away from water sources and spread across the continent. A team of geneticists compared DNA sequences from a variety of people around the world to see how different populations relate to one another and when they have gone their separate ways. The scientists found that a key genetic variant gave humans the ability to convert fats from plants into essential nutrients for the brain.
The study, published in the journal Public Library of Science (PLOS), suggests that the gene mutation would have allowed Homo sapiens to leave the bodies of water in central Africa where they ate fish. Homo sapiens first appeared 180,000 years ago but stayed around bodies of water in central Africa for almost 100,000 years. Himalayan Meltdown’ Wins Prize at Film Festival.
Mugger crocodiles in Iran. Mugger crocodile and its distribution in Iran: By Asghar Mobarak and Elham Abtin Courtesy of Wildlife Middle East Mugger or Marsh crocodile (Crocodylus palustris) is a medium to large crocodile (max. length approx. 4-5 m) and has the broadest snout of any living member of the genus Crocodylus.
The Mugger crocodile's range includes Bangladesh, India, Nepal, Pakistan, Sri Lanka and Iran. The fresh water habitats of Iran's Sistan & Baluchestan province (in South-eastern Iran, near the Pakistan border) are the western boundary of the Muggers range and this small, scattered population is the only one in Iran. Palaeobiology and Biodiversity Research Group, Department of Earth Sciences, University of Bristol. Today Haţeg is a landlocked town within the Eastern European country of Romania but 70 million years ago during the late Cretaceous it was an island within a shallow sea that covered much of today's Southern Europe.
At almost 80,000 square kilometers in size it was similar to today's Caribbean island of Hispaniola (Csiki 2005). It was formed by uplift caused by the closing of the Tethys Ocean by the collision of the African and Eurasian plates, a collision which is also responsable for mountain chains in both Southern Europe and North Africa and a process which is still occuring today as Africa pushes North. This island contains one of the most studied late Cretaceous dinosaur fauna outside of North America. Wadi Al-Hitan (Whale Valley), Egypt. Geographical Location Wadi Al-Hitan (29° 15’ 13'' to 29° 23’ 56''N by 30° 00’ 41'' to 30° 10’ 06 E) is a World Heritage Site in the Western Desert 150 kilometers (km) southwest of Cairo and 80 km west of Faiyum in the Wadi el-Rayan Protected Area.
Dates and History of Establishment 1905: Fossil whales first discovered on the site; named Basilosaurus;1970s: Wadi el-Rayan lakes and wetland created by agricultural drainage from Faiyum;1980s: Geologists began to study the whale fossils, naming the area Whale Valley (Wadi Al-Hitan); 1989: Wadi el-Rayan Protected Area (WRPA) declared by Prime-ministerial Decree 943 under Law 102 of 1983 on Natural Protectorates;1997: Wadi Al-Hitan included as a Special Protected Area within the Wadi el-Rayan Protected Area by Prime-ministerial Decree 2954.
Area. New Prehistoric Crocodile Found in "Kitchen Counters" The Early Earth and Plate Tectonics. GEOL 104 In the Shadow of the Dinosaurs: Pterosaurs, Marine Reptiles, Mesozoic Mammals, Mesozoic Plants. Origin of the Fuzzballs: The First 7/10ths of Mammalian History On land during the Mesozoic, there were plenty of organisms other than dinosaurs.
Among the most important (especially for us!) Were the mammals. Mammals and their closest relatives (more properly Mammaliformes, or sometimes "Mammaliaformes") appear in fossil record the same time as dinosaurs, in Late Triassic. Mammals are very advanced therapsids synapsids. True mammals (Mammalia) found from Middle Jurassic onward. Like birds, many of the features that characterize modern mammals don't fossilize: Many features limited to Mammalia among living amniotes were probably found in their closest non-mammalian therapsids relatives. Continental Drift - History Of Wegener's Theory - Continents, Earth, America, and Africa.
At one time—estimated to be 200 to 300 million years ago—continents were united in one supercontinent or protocontinent named Pangaea (or Pangea, from the Greek pan, meaning all, and gaea, meaning world) that first split into two halves. The two halves of the protocontinent were the northern continent Laurasia and the southern continent named Gondwanaland or Gondwana.
These two pieces were separated by the Tethys Sea. Laurasia later subdivided into North America, Eurasia (excluding India), and Greenland. Gondwana is believed to have included Antarctica, Australia, Africa, South America, and India. Most ancient crocodile discovered, Aegisuchus witmeri. Artist's Rendering of Shieldcroc (Aegisuchus witmeri); Credit: Orginal artwork by Henry P.
Tsai, University of Missouri Crocodiles and their relatives the crocodyliforms, go back a long way and were as diverse as imagination itself. From land to sea, herbivorous species to giant predators, they can be held as one of the true great marvels of animal evolution. Their current representatives are smaller, but no less mean and successful, just as they have outlasted almost every other tetrapod group.
The Tethys Sea between northern Laurasia and Gondwanaland seems to be the real origin of the ancient crocodiles, instead of the Laurasian origin which was once thought likely. Global extinction: Gradual doom is just as bad as abrupt. A painstakingly detailed investigation shows that mass extinctions need not be sudden events.
The deadliest mass extinction of all took a long time to kill 90 percent of Earth's marine life, and it killed in stages, according to a newly published report. Thomas J. Algeo, professor of geology at the University of Cincinnati, worked with 13 co-authors to produce a high-resolution look at the geology of a Permian-Triassic boundary section on Ellesmere Island in the Canadian Arctic.
Their analysis, published Feb. 3 in the Geological Society of America Bulletin, provides strong evidence that Earth's biggest mass extinction phased in over hundreds of thousands of years. About 252 million years ago, at the end of the Permian period, Earth almost became a lifeless planet. Tethys Petroleum unveils official opening of new rail loading facility in Kazakhstan. 30th Jan 2012, 9:43 am by Deborah Sterescu Tethys Petroleum (TSE:TPL)(LON:TPL) announced Monday the official inauguration of a new oil storage and rail loading facility for oil shipments from the company's Doris oilfield into the Kazakh rail system in Kazakhstan.
Tethys announces completion of US$13 million private placement. Animals Have Emotions, May Help People Understand Theirs. Tethys Oil announces strong Oman oil output. Tethys Oil makes discovery onshore Oman - World Oil. Tethys Oil makes discovery onshore Oman.
Hunting for Fossil Rock in the Arabian Desert. Ajmal spends his weekends scouting for animals and life in the desert. Heavy snow halts Tethys oil transport in western Kazakhstan. Tethys « ferrebeekeeper. Andrewsarchus Skull at the American Museum of Natural History. Global Extinction Need Not be Sudden Events. Global Extinction Need Not be Sudden Events. Major events in Caspian countries' oil and gas industry for last week (Jan. 30- Feb. 4) Azerbaijan and Italy discuss prospects of cooperation in energy sector.