Uncategorized

  1. Health & Medicine

    Boosting the TB vaccine

    A new vaccine for tuberculosis outperforms the current one in tests on animals.

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  2. Chemistry

    Drug smugglers leave cellular tracks

    Imaging reveals where some experimental nanoscale capsules ferry drugs when they enter cells.

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  3. Astronomy

    A black hole that goes the distance

    Astronomers have measured the mass of the most distant black hole known.

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  4. Paleontology

    Ancient wood points to arctic greenhouse

    Chemical analyses of wood that grew in an ancient arctic forest suggest that the air there once was about twice as humid as it is now.

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  5. Health & Medicine

    Fecal glow could improve meat safety

    Workers who process animal carcasses into meat might soon use a novel type of laser scanner to identify products that have been contaminated with feces.

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  6. Astronomy

    Supernovas, gamma-ray bursts: Two of a kind?

    Astronomers have uncovered direct evidence that gamma-ray bursts are linked to supernovas.

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  7. 19321

    Your article was very interesting. While hiking in terrains ranging from midwestern prairies to alpine environments, I’ve seen different forms of buckling due to freezing forces. Though evaporation was given a nod in the article, it too can be a significant force to form patterned ground. In March of 2002, I walked out to the […]

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  8. Earth

    Patterns from Nowhere

    Scientists are developing geophysical models that may explain the polygonal patterns that appear in and on the ground in remote regions of the Arctic, Antarctica, and possibly the surface of Mars.

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  9. Chemistry

    Plastic Electric

    Scientists are finding new ways to improve the molecular order and electrical conductivity of a commercially important conducting plastic.

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  10. Humans

    From the May 13, 1933, issue

    RISING SILENTLY TO PROTECT NATIONS TIME Almost as silently as you view the new domed building in the cover picture, this all-steel structure is rising at the U.S. Naval Observatory in Washington. There is no hammering of rivets to fray the nerves of humans and upset the accuracy of the delicate Naval Observatory clocks that […]

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  11. Planetary Science

    Mars Photo of the Day

    With a stock of more than 120,000 images, the camera team for NASA’s Mars Global Surveyor mission has started daily postings of pictures to showcase the diversity of Martian landscapes. Click on the photo to obtain additional information about what the image reveals. Go to: http://www.msss.com/

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  12. Math

    Sequence Puzzles

    Given a sequence consisting of the whole numbers 1, 4, 9, 16, 25, 36, and 49, what number comes next in the sequence? The most likely answer is 64–the next number in a sequence of squares of consecutive integers, starting with 1. Such sequence puzzles are a staple of textbook exercises, brainteaser collections, and various […]

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