Charles Petit

All Stories by Charles Petit

  1. Physics

    Invisibility Uncloaked

    In the race to make things disappear, scientists gain ground on science fiction.

  2. Astronomy

    The Star That Ate a Mars

    COVER STORY: Scientists probe debris trapped by white dwarfs to learn more about what faraway Earthlike planets are made of.

  3. Cold Panacea

    Two researchers proclaimed 20 years ago that they’d achieved cold fusion, the ultimate energy solution. The work went nowhere, but the hope remains.

  4. Astronomy

    Ultramassive: as big as it gets

    A black hole can consume anything in its path. These monsters can become huge — but perhaps only so huge.

  5. Space

    Black holes have limits

    A review of current evidence suggests an upper limit to a black hole's size.