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17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
- About Us
5 April 2002 (All day)
Another of nature's secrets has been pried from her bosom: Scientists have figured out how to monitor the pressure a boa constrictor exerts while squeezing a rabbit to death.
Engineers at Carnegie Mellon University in Pittsburgh, Pennsylvania, constructed a "constrict-o-meter" at the request of local zookeepers who wanted a visual measure of the snake's coil power for an episode of BBC's Animal Planet. The device, a pressure-sensitive, quarter-sized plate mounted on the end of a 30-centimeter-long probe, is placed between the snake and its prey, says mechanical engineer Adnan Akay, who designed the rig with two assistants. Wires carry the information from the probe to a laptop computer, which plots the pressure. A 5.5-meter python, for example, can create a force of about 1 kilogram per square centimeter on its victim--about six times as rigorous as a firm handshake.
Herb Ellerbrock, who works with the cold-blooded creatures at the Pittsburgh Zoo, says when he approached the Carnegie Mellon engineers with his unusual request, "I thought they'd laugh me out of the room." But the collaboration on the constrict-o-meter worked out so well that he and Akay are planning additional experiments. "Now I'd like to see how many pounds per square inch the small snakes can do," says Ellerbrock.