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Kakani Katija, a graduate student at the California Institute of Technology, believes it's possible, based on her recent experiments with jellyfish blooms in a freshwater lake in Palau. Using high-powered underwater lasers and video cameras, Katija and her team studied how the movement of jellyfish impacts the water around them. Researchers placed a fluorescent dye in front of the jellyfish and observed what happened as the jellyfish swam through it. To their surprise, rather than swimming through the dye, the jellyfish appeared to pick it up, tucking it in a space just behind their tentacles. As the jellyfish...
...high-pressure field is created in front of the body, and a low-pressure field is created at the back of the body," explains Katija, and the low-pressure acts like a vacuum, sucking in the nearby water when the jellyfish begins to move. "What we have found is a mechanism that would allow for animals to mix water efficiently when they swim...
...research, published in the journal Nature, would suggest that the mass movement of marine animals - even tiny zooplankton like krill - may play a significant role in churning the ocean. It may help mix cooler water with warm, and disperse salts, nutrients and pollutants across the various layers of the ocean, which is critical to the strength of ocean currents and the health of the marine ecosystems. Although ocean-mixing is largely attributed to winds and ocean tides, scientists say those factors cannot account for all the energy required to power, for example, the complete circulation of cold and warm water...
...study published in the journal Science in 2006, a group of scientists reported that they had recorded enormous water turbulence in a fjord in Canada caused by a swarm of swimming krill. These tiny shrimplike organisms have a predictable up-and-down movement: during the day, they descend several hundred feet in the ocean, where there is less light and fewer predators; as the sun sets, they swim up to the surface to feed. Swarms of krill can be massive - some the size of Rhode Island - so oceanographers have suspected that their movements may cause significant ocean-mixing. But despite...
...better days between the two countries. In 1994, during Clinton's first term in office, the two sides entered into the Agreed Framework, the first time Pyongyang agreed to abandon its nuclear-weapons program in return for a range of economic benefits, including the construction of two light water nuclear reactors to generate electricity for the impoverished country. In fact, it was pursuit of that agreement that set the precedent for Clinton's current trip: at a moment when it seemed as if a deal might be falling apart, Clinton dispatched former President Jimmy Carter to meet with...