Birds can in fact be classified as dinosaurs-specifically, as members of the theropod lineage. As sunken wrecks make clear, the shipbuilders' intuition guided the construction of vessels that were amazingly light and resilient. The data that came in from the cold. Since 1992 U.S. intelligence has shared archives of spy satellite images and other secret records with environmental scientists. This collaboration has been fruitful but poses thorny questions about basing research on classified information.
Membranes can disguise themselves as strings yet provide more answers.
For tens of thousands of years, ice accumulating in Greeland has preserved details of the earth's climate and atmosphere. By extracting samples that run kilometers deep, researchers can peer directly into the past. Hidden in that ancient ice are subtle clues as to when the next ice age might begin. Most of the pollutants reaching people's bodies today come from materials intentionally or unintentionally brought into the home.