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...growing food group, and global demand has doubled since that time. Here's the catch: It takes a lot of input, in the form of other, lesser fish - also known as "reduction" or "trash" fish - to produce the kind of fish we prefer to eat directly. To create 1 kg (2.2 lbs.) of high-protein fishmeal, which is fed to farmed fish (along with fish oil, which also comes from other fish), it takes 4.5 kg (10 lbs.) of smaller pelagic, or open-ocean, fish. "Aquaculture's current heavy reliance on wild fish for feed carries substantial ecological risks," says...
...human-powered flight machine, the keenly intellectual aeronautics engineer Paul MacCready, above, insisted that inventing anything--even if impractical--spawned something critically important: a new way of thinking about the world. In August 1977 the curious, free-spirited inventor unveiled his Gossamer Condor, a winged, 70-lb. (about 30 kg) contraption made of piano wire, aluminum tubing and Mylar, which completed the first sustained human-powered flight. "Your parents will be wrong. Your schools will be wrong," he told a group of schoolchildren in 1998. "If you look for the answers yourself, you will find that you can do better...
...before that. For generations, Bun Neang's family has depended on the bounty of Cambodia's Tonle Sap, a vast lake fed by one of the world's greatest rivers, the Mekong. Two decades ago, his father could rely on a daily catch totaling about 65 lbs. (30 kg). When the water gods were feeling particularly charitable, he would land a Mekong catfish, a massive bottom-feeder that can weigh as much as a tiger. But today, when Bun Neang dips his net into the caramel-hued waters near Chong Koh village, all the 30-year-old can hope...
...junior Louis Caputo wrestled to a ninth-place finish at the Junior World Championships hosted by the China Agricultural University this Sunday in Beijing. Caputo, who represented the United States at the tournament after winning the FILA Junior World Team Trials in late May, competed in the freestyle 84 kg. weight class and posted a 2-2 record. After defeating Canada’s Cotlen Woznow, 3-1, 4-0, Caputo fell to Anzor Urishev of Russia in a shutout. In his match against China’s B. Huwatibieke in the wrestlebacks, Caputo relied on superior footwork...
...study the ways in which [Lucy's] skeleton was designed for various types of movement and posture," Kappelman explains. Researchers already know that Lucy is likely a direct ancestor of our own species, Homo sapiens, stood about 3.5 ft. (1 m) tall, weighed about 60 lbs. (27 kg) and walked upright on two legs, though she may also have spent time in trees. Lucy's remains include portions of the arms and legs, so researchers will be able to compare her limb movements with those of, say, modern humans and chimpanzees...