Vol. 164 No. #6
Archive Issues Modal Example

More Stories from the August 9, 2003 issue

  1. Physics

    Gluing building blocks with geometry

    Using blocks with simple shapes, researchers have found ways to construct strong panels with no fasteners securing most of the blocks.

  2. Naps with stages spark learning

    Napping shows potential as a way to stimulate learning.

  3. Chemistry

    Chemical rings act as a minirotor

    Interlocked molecular rings form new minirotors, including some in which scientists can control the rotational direction.

  4. Health & Medicine

    Clot buster attached to red blood cells avoids complications

    Attaching a clot-busting drug to red blood cells limits the drug's side effects, a study in animals shows.

  5. Earth

    For European lakes, how clean is clean enough?

    New research on lakes in Denmark suggests that agriculture has been affecting water quality there for more than 5,000 years.

  6. Paleontology

    A human migration fueled by dung?

    When people made their way from Asia to the Americas, the path they took may have been covered in dung.

  7. Earth

    Large lake floods scoured New Zealand

    A volcanic region of New Zealand’s North Island experienced immense floods and severe erosion when lakes filling the craters of dormant volcanoes burst through the craters' rims and poured down the slopes.

  8. Health & Medicine

    Virus Shield: Ebola vaccine works fast in monkey test

    Tests on monkeys show that an experimental vaccine can build immunity against Ebola virus within a month, suggesting the vaccine might help contain outbreaks of the deadly pathogen.

  9. Winning Bet: Horse and mule clones cross the finish line

    Scientists have for the first time cloned a mule and a horse.

  10. Paleontology

    Three Species No Moa? Fossil DNA analysis yields surprise

    Analyses of genetic material from the fossils of large flightless birds called moas suggest that three types of the extinct birds may not be separate species after all.

  11. Anthropology

    New World Newcomers: Men’s DNA supports recent settlement of the Americas

    New data on genetic differences among the Y chromosomes of Asian and Native American men support the notion that people first reached the Americas less than 20,000 years ago.

  12. Ecosystems

    Shark Serengeti: Ocean predators have diversity hot spots

    The first search for oceanic spots of exceptional diversity in predators has turned up marine versions of the teeming Serengeti plains.

  13. Tech

    Shining True: Marking original documents with a lick of gloss

    Scientists have a new way of making forgery-proof documents by using laser color printers to embed hologramlike images in a document’s glossy surface.

  14. Physics

    Electric Foam: Scientists uncover basis of material oddball

    Specially treated polypropylene foam can mimic the defining behavior and other desirable properties of ceramic piezoelectric materials, which generate electric signals when squeezed.

  15. Plants

    Emergency Gardening

    High-tech tissue culture is helping some ultrarare plants finally have sprouts of their own.

  16. Materials Science

    Layered Approach

    A decade-old method for creating thin coatings is poised to move from the lab to countless low- and high-tech products.