1. Physics

    The Brazil nut effect gets more jumbled

    New and puzzling evidence for why big particles bob to the top when mixtures of granular materials are shaken-the so-called Brazil nut effect-emerges from an experiment showing that even the air between grains plays a role.

  2. Physics

    Nobel prize: Physics

    Three scientists have jointly won the 2001 Nobel Prize in Physics for creating the first samples, 6 years ago, of a long-sought and strange state of matter called a Bose-Einstein condensate.

  3. Materials Science

    Adhesive loses its stick with heat

    A new type of epoxy adhesive loses its stickiness when heated, allowing easy separation of materials that were once tightly bonded.

  4. Materials Science

    Tiny detector finds hydrogen better

    Researchers have made a miniature device that can quickly detect hydrogen leaks.

  5. Physics

    Magnets, not magic, make gas bulbs bad

    Once as baffling as black magic, the random failures of glass bulbs used in magnetic resonance imaging (MRI) now appear to stem from unexpected magnetization of the glass.

  6. Physics

    Path to new elements now looks steeper

    Making novel, superheavy elements is harder than was previously expected, according to a new experiment, but the findings may also help physicists better choose which atoms to smash into which.

  7. Physics

    Constant Changes

    Evidence from the early universe that one of the so-called constants of nature, known as alpha, was once slightly smaller than it is today hints that the laws of physics themselves may vary over time and space.

  8. Physics

    Atomic Crowds Tied by Quantum Thread

    Quantum states of record numbers of atoms—entire atom clouds—get blended together by physicists wielding a new, relatively simple technique in quantum telecommunications and computing.

  9. Materials Science

    Ceramics stretch for future applications

    Researchers have created a ceramic that stretches to 10 times its original length in record time.

  10. Physics

    Model may expose how friction lets loose

    Rather than just grinding past each other, sliding surfaces may tremble with minuscule ripples that overcome friction as they move along.

  11. Materials Science

    Materials use nitric oxide to kill bacteria

    A novel coating may offer a new way to fend off microbial buildup on catheters, artificial hips, and replacement cardiac valves.

  12. Materials Science

    Speed demon gets hooked on silicon

    A method for coating silicon with high-performance semiconductors such as gallium arsenide may make faster, low-power microcircuits both cheaper and more widespread.