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Physicists explain the long, useful lifetime of carbon-14

The long, slow decay of carbon-14 allows archaeologists to accurately date the relics of history back to 60,000 years.

Physics / General Physics

created May 26, 2011 | popularity 4.8 / 5 (14) | comments 33 | with audio podcast

Big cats, wild pigs and short-eared dogs -- oh, my!

The Wildlife Conservation Society (WCS) released photos today from the first large-scale census of jaguars in the Amazon region of Ecuador—one of the most biologically rich regions on the planet.

Biology /

created Jan 27, 2009 | popularity 4 / 5 (5) | comments 0

Jaguar and Williams F1 set for UK-made hybrid car

Indian-owned automaker Jaguar has joined forces with Formula One racing group Williams to produce a British-made commercial model of their hybrid C-X75 supercar, the pair announced on Friday.

Technology / Energy & Green Tech

created May 08, 2011 | popularity 5 / 5 (2) | comments 0 | with audio podcast

So. Ariz. man pleads guilty in jaguar's death

(AP) -- A southern Arizona biologist pleaded guilty on Friday to a misdemeanor federal charge for his role in the 2009 trapping and subsequent death of a rare jaguar known as "Macho B."

Biology / Ecology

created May 15, 2010 | popularity 3 / 5 (2) | comments 0

First jaguar photo taken at Smithsonian Research Station in Panama

Barro Colorado Island in Panama, home of the Smithsonian Tropical Research Institute's premier tropical biology field station, has been described as the best-studied piece of tropical real estate in the western ...

Biology / Plants & Animals

created May 04, 2009 | popularity 4 / 5 (1) | comments 0

U Arizona Wild Cat Research Center to study jaguar presence in the Southwest

The recent sighting of an adult male jaguar in Cochise County in southeastern Arizona came as a reminder that even though the big spotted cat usually is associated with dense rainforests in central and southern ...

Biology / Ecology

created Dec 01, 2011 | popularity 4 / 5 (1) | comments 0

Jaguar

The jaguar ( /ˈdʒæɡwɑr/ or UK /ˈdʒæɡjuː.ər/; Panthera onca) is a big cat, a feline in the Panthera genus, and is the only Panthera species found in the Americas. The jaguar is the third-largest feline after the tiger and the lion, and the largest in the Western Hemisphere. The jaguar's present range extends from Southern United States and Mexico across much of Central America and south to Paraguay and northern Argentina. Apart from a known and possibly breeding population in Arizona (southeast of Tucson), the cat has largely been extirpated from the United States since the early 20th century.

This spotted cat most closely resembles the leopard physically, although it is usually larger and of sturdier build and its behavioral and habitat characteristics are closer to those of the tiger. While dense rainforest is its preferred habitat, the jaguar will range across a variety of forested and open terrain. It is strongly associated with the presence of water and is notable, along with the tiger, as a feline that enjoys swimming. The jaguar is largely a solitary, opportunistic, stalk-and-ambush predator at the top of the food chain (an apex predator). It is a keystone species, playing an important role in stabilizing ecosystems and regulating the populations of the animals it hunts. The jaguar has an exceptionally powerful bite, even relative to the other big cats. This allows it to pierce the shells of armoured reptiles and to employ an unusual killing method: it bites directly through the skull of prey between the ears to deliver a fatal bite to the brain.

The jaguar is a near threatened species and its numbers are declining. Threats include habitat loss and fragmentation. While international trade in jaguars or their parts is prohibited, the cat is still frequently killed by humans, particularly in conflicts with ranchers and farmers in South America. Although reduced, its range remains large; given its historical distribution, the jaguar has featured prominently in the mythology of numerous indigenous American cultures, including that of the Maya and Aztec.

For more information about Jaguar, read the full article at Wikipedia.
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