Alexandra Witze

Contributing Correspondent

Alexandra Witze is a contributing correspondent based in Boulder, Colorado. Among other exotic locales, her reporting has taken her to Maya ruins in the jungles of Guatemala, among rotting corpses at the University of Tennessee's legendary "Body Farm," and to a floating sea-ice camp at the North Pole. She has a bachelor's degree in geology from MIT and a graduate certification in science communication from the University of California, Santa Cruz. Among her honors are the Science-in-Society award from the National Association of Science Writers (shared with Tom Siegfried), and the American Geophysical Union's award for feature journalism. She coauthored the book Island on Fire, about the 18th-century eruption of the Icelandic volcano Laki.

All Stories by Alexandra Witze

  1. Ozone hole

    Year in review: Ozone hole officially on the mend

    Research this year confirms that the Antarctic ozone hole is healing — an international success attributed to cooperation and new technologies.

  2. Tenio Popmintchev

    Tenio Popmintchev fits X-ray laser on a tabletop

    Laser physicist Tenio Popmintchev has created a Swiss-army-knife tool made of light.

  3. gold

    Where the young hot Earth cached its gold

    A simulation of the infant Earth provides a new view of how the iron-loving precious metals ended up buried deep in the planet’s core.

  4. iron

    Iron-loving elements tell stories of Earth’s history

    By studying geochemical footprints of rare elements, researchers get a glimpse of the planet’s evolution.

  5. avalanche on Mt. Everest

    The science of avalanches

    High-tech instruments are helping researchers study how temperature can change the character — and danger — of an avalanche

  6. geysers on Enceladus
    Planetary Science

    Year in review: Global ocean spans Enceladus

    NASA's Cassini spacecraft is offering the best evidence yet that Saturn's moon Enceladus could be a great place to search for extraterrestrial life.

  7. mars salt flow
    Planetary Science

    Year in review: Best evidence yet for water on Mars

    New data from the Mars Reconaissance Orbiter supported the presence of salty water on Mars.

  8. tiny semiconductor particles
    Quantum Physics

    Quantum dots get a second chance to shine

    Quantum dots, semiconductor particles that can emit a rainbow of colors, have been put to work observing living cells, with possible benefits for medical diagnosis.

  9. Curiosity rover
    Planetary Science

    The Martian Diaries

    Curiosity has explored Mars for over two and a half years. What if NASA's rover kept a scrapbook?

  10. Glines Canyon Dam

    Dam demolition lets the Elwha River run free

    Removing a dam involves more than impressive explosions. Releasing a river like Washington state's Elwha transforms the landscape and restores important pathways for native fish.

  11. mars rover curiosity
    Planetary Science

    Year in review: Business booming on Mars

    Mars now has seven robots studying it and together they have given scientists their best view of any planet in the solar system other than Earth.

  12. reconstruction of an arachnid

    3-D scans reveal secrets of extinct creatures

    Paleontologists can dig into fossils without destroying them and see what’s inside using 3-D scanning. What they’re learning helps bring the past to life.