Word: treeing
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...comparing the DNA of the 1959 virus with that of samples taken from the '80s and '90s, Ho and his colleagues constructed a viral family tree in which the Leopoldville isolate sits right at the juncture where three subtypes branch out. The 39-year-old specimen is also strikingly similar to the other seven subtypes. The clear implication: all the viral strains can be traced back to a single event or a closely related group of events. One theory is that AIDS started through contact with infected monkeys in a remote area and spread to the rest of the population...
...make it their business to track the world's weather, however, have appreciated it all along. This El Nino may be the most studied weather phenomenon of all time. For months, and in some cases years, meteorologists have been poring over weather maps, running supercomputer simulations, studying coral reefs, tree rings and glacial ice--all to try to understand the dynamics of a pool of warm water in the Pacific...
External forces may also help explain why El Nino has a different impact on the weather from one cycle to the next. Recently, for example, Ed Cook of Lamont-Doherty and Julie Cole of the University of Colorado used tree rings from hundreds of sites to see how El Nino affected North America in the past. Before 1920, they found, El Nino appears to have affected a much larger region of the U.S. than it does today, channeling winter rain and snow all the way up into the Great Lakes and Great Plains. Afterward, however, its sphere of influence retreated...
That's why corals and tree rings and ice cores are so important. They are like a tape recording of the various instruments in the climate orchestra, ranging from El Nino's high-frequency violin to the deeper cello- and basslike tones struck by longer-term cycles. By studying the hidden rhythms in these signals, scientists may finally be able to see how the parts fit together, sometimes harmonizing, sometimes clashing...
...tales of intimate encounters with the President. She certainly shared the view of those who disapproved of the frolicsome Clinton culture, and was pleased by the 1996 publication of former FBI agent Gary Aldrich's book in which he alleged that sex toys dangled from the White House Christmas tree. Tripp was annoyed by the efforts of the President's men to discredit the author...