(Phys.org) —Some thirty million years ago, Ganges river dolphins diverged from other toothed whales, making them one of the oldest species of aquatic mammals that use echolocation, or biosonar, to navigate and find food. ...
Plants & Animals
Apr 4, 2013
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A new fossil discovered in Tunisia represents the oldest known ancestor of modern-day sea cows, supporting the African origins of these marine mammals. The find is described in research published January 16 in the open access ...
Archaeology
Jan 16, 2013
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(Phys.org) -- When tiny aquatic organisms reproduce in large amounts, algal blooms occur that take over portions of open water up to hundreds of miles in area.
Ecology
Aug 15, 2012
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The fate of the world's great whale species commands global attention as a result of heated debate between pro and anti-whaling advocates, but the fate of smaller marine mammals is less understood, specifically because the ...
Ecology
Jan 24, 2012
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With the constant churn of freighter propellers, the percussive thump of oil and gas exploration and the underwater din of military testing, ocean noise levels have become unbearable for some sea mammals.
Plants & Animals
Dec 7, 2011
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(AP) -- People aren't the only ones in Florida who don't like cold weather. Manatees - those giant aquatic mammals with the flat, paddle-shaped tails - are swimming out of the chilly Gulf of Mexico waters and into warmer ...
Plants & Animals
Dec 30, 2010
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(PhysOrg.com) -- Do fish feel pain? Victoria Braithwaite, Penn State professor of fisheries and biology, has spent decades studying that question. In her recently published book, "Do Fish Feel Pain?" she examines whether ...
Plants & Animals
Nov 16, 2010
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Picture a dinosaur. Huge, menacing creatures, they ruled the Earth for nearly 200 million years, striking fear with every ground-shaking stride. Yet these great beasts were no match for a 6-mile wide meteor that struck near ...
Plants & Animals
Jan 28, 2010
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An aquatic lifestyle imposes serious demands for the organism, and this is true even for the tiniest molecules that form our body. When the ancestors of present marine mammals initiated their return to the oceans, their ...
Cell & Microbiology
Jun 29, 2009
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(PhysOrg.com) -- Researchers from the United States and Canada have found a fossil skeleton of a newly discovered carnivorous animal, Puijila darwini. New research suggests Puijila is a "missing link" in the evolution of ...
Archaeology
Apr 22, 2009
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