Word: kg
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Dates: during 1990-1999
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What is especially disturbing about Peterson's work is that the levels of dioxin needed to do that kind of damage were as low as 64 nanograms per kg of body weight -- only a little greater than the 5 or 10 nanograms of dioxin and comparable chemicals found in a typical kilogram of human tissue. It is not surprising that these compounds are so biologically active, since they are metabolized in a fashion similar to natural chemicals. Says Linda Birnbaum of the EPA's Health Effects Research Laboratory, who was one of the driving forces behind the agency's decision...
...less than a gram of highly enriched uranium -- probably fuel from a nuclear-powered submarine -- in Landshut. Even if all + this smuggled booty were put together, there would not be enough for the smallest and crudest atom bomb, which in the hands of inexperienced makers would take about 8 kg of plutonium...
...military contacts in the former Soviet Union. Last weekend police arrested other couriers who arrived on a flight from Moscow. They were carrying more than 10.6 oz. of plutonium-239, a substance so toxic that a few millionths of a gram can kill. Another seizure netted 4 kg, the largest amount ever discovered in private hands. Though German analyses reportedly show that all the plutonium came from the former Soviet Union, red-faced officials in Moscow today denied it, claiming "no leak" had been detected. Unconvinced, Chancellor Helmut Kohl plans to send his national security adviser east for a chat...
...About 18 lbs. (8 kg.) of this enriched plutonium is needed to produce one fission bomb. The rods now contain enough material to make four or five bombs...
...ERRANT COMET, ANGRY volcano or invidious virus killed the dinosaurs 65 million years ago. Scientists have still not explained how the Saurian dynasty got started or why it dominated the earth for more than 150 million years. The discovery in northwestern Argentina of the fossilized skeleton of a 10-kg (22-lb.) carnivore that is 230 million years old may help paleontologists begin to solve the mystery. In the British journal Nature, researchers from the University of Chicago and the National University of San Juan, Argentina, report that the dog-size predator is the most primitive dinosaur ever found...