8 P.M. (Smithsonian) SPACE SHUTTLE: THE FINAL COUNTDOWN NASA scientists, administrators and astronauts, as well as Smithsonian Institution historians, chronicle the shuttle era.
Only in its final hours will scientists have a clear idea of where and when the spacecraft will re-enter the atmosphere.
The scientists' final test of Mr. Hockney's theory was to have a realist painter render a chandelier as accurately as he could merely by eyeballing it.
The bills would undercut one of the primary reasons for the act, which was to relieve Congress of the impossible task of legislating protections species by species and leave the final determination to scientists and wildlife management professionals.
Although the sudden shifts occur naturally, the changes in the environment, including flooding the atmosphere with carbon dioxide or cutting swaths of rain forests, could act as a final push, the scientists said.
Creating the mouse embryos was the final proof the scientists needed to demonstrate that the stem cells were "pluripotent", and so capable of developing into any specialised tissue of an adult animal, including the "germ cells" that make sperm and eggs.
Space may be the final frontier, but scientists have found plenty of head-scratchers right here on one of Earth's zippiest creatures, the humble hummingbird.
In a final study, the scientists manipulated volunteers' beliefs about happiness -- stability or flexibility -- and then measured both their empathy and behavior toward people with depression.
In a final experiment, the scientists showed that infants as young as 6 months old are using such social information from adults to help identify plants as a safe food source.
While the pace of research was easing as the war entered its final phase, these scientists were still in great demand, and it fell to Anderson, Cherwell and Sir Edward Appleton, the permanent secretary of the Department of Scientific and Industrial Research, which was responsible for Tube Alloys, to prise them away from the wartime projects in which they were invariably engaged.
