Vol. 159 No. #25

More Stories from the June 23, 2001 issue

  1. Chemistry

    Chemists make hard-to-catch molecules

    Chemists have devised a new way to stabilize highly reactive molecules called carbenes.

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  2. Chemistry

    Hassium holds its place at the table

    Researchers have performed the first ever chemical studies on the element hassium.

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  3. Paleontology

    Fossil footprints could be monumental

    Trace fossils found in a vacant lot in a small town in Utah, including the footprints of meat-eating dinosaurs, could soon be protected as part of a new U.S. national monument.

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  4. Paleontology

    Sahara yields second-largest dinosaur

    Excavations near an Egyptian oasis have unearthed the fossils of an animal that probably ranks as the second-most-massive dinosaur known.

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  5. Tech

    Polymer takes dim view of explosives

    By spraying surfaces with a light-emitting polymer, researchers have taken a step toward making new sensors for traces of common explosives.

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  6. Tech

    Robosaur roams with spring in its step

    The novel dinosaur robot Troodon takes two-legged walking machines onto new terrain.

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  7. Tech

    Device fingers chemical thugs at scene

    A compact, new instrument exploits quantum mechanics to rapidly identify illegal drugs, pollutants, and other chemicals, on the spot.

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  8. Physics

    Physics Bedrock Cracks, Sun Shines In

    The first data from a new Canadian detector of particles called neutrinos not only resolve a 30-year-old puzzle about how the sun works, but also revise estimates of mysterious "dark" matter in the universe and strengthen a key challenge to the prevailing theory of particle physics.

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  9. Paleontology

    Two new dinosaurs chiseled from fossil gap

    A sleek predator and a pot-bellied giant dinosaur have emerged from North American rocks to fill in a 30-million-year gap in the dinosaur fossil record.

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  10. Health & Medicine

    Leukemia overpowers drug in two ways

    Researchers discover why the anticancer drug Gleevec, also called STI-571, helps many patients who have chronic myelogenous leukemia but not those who have entered the crisis stage of the disease.

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  11. Babies may thrive on wordless conversation

    Although unable to say a word, 4-month-olds coordinate the timing of their vocalizations with those of adult partners in conversational ways that may have implications for social and intellectual development.

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  12. Chemistry

    Chemists decorate nanotubes for usefulness

    Researchers have developed a new technique for attaching groups of atoms to the sides of carbon nanotubes, creating compounds with extraordinary strength and conductivity.

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  13. Health & Medicine

    Studies suggest how salad may protect heart

    Lutein, a yellow pigment in many fruits and vegetables, may inhibit processes that jump-start the development of atherosclerosis.

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  14. Animals

    Fruit flies hear by spinning their noses

    Drosophila have a rotating ear—and odor-sensing—structure that's new to science.

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  15. Health & Medicine

    Prostate protection? This is fishy

    Diets rich in fish may cut a man's risk of prostate cancer.

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  16. Health & Medicine

    Forget about jet lag, and much more

    Airline flight attendants with chronic jet lag have higher stress hormone concentrations and smaller temporal lobes (centers of short-term memory in the brain)than do more rested attendants.

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  17. Astronomy

    An Illuminating Journey

    Astronomers are beginning to use the cosmic microwave background, the remnant glow from the Big Bang, in a dramatically different way: Instead of treating it as a snapshot of the early universe, researchers are proposing to employ the radiation as a flashlight that probes the evolution of structure in the universe over its entire 13-billion-year history.

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  18. Chemistry

    Perfecting Porosity

    Researchers are designing novel porous materials that could clean up toxins, store gases, or catalyze difficult chemical reactions.

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