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. southern ocean in Antarctica
    Climate

    The Southern Ocean may be less of a carbon sink than we thought

    The Southern Ocean’s ability to suck up much of the carbon that humans pump into the atmosphere is in question.

  2. mammoth, mastodon, and gomphothere
    Ecosystems

    How mammoths competed with other animals and lost

    Mammoths, mastodons and other ancient elephants were wiped out at the end of the last ice age by climate change and spear-wielding humans.

  3. child drinking
    Life

    More than 2 billion people lack safe drinking water. That number will only grow.

    By 2050, half the world’s population may no longer have safe water to drink or grow food. What then?

  4. Fuego volcano
    Earth

    Here’s a look at the world’s deadliest volcanoes — and the ways they kill

    Scientists gathered data on nearly 280,000 global volcano deaths from 1500 to 2017 and sorted fatalities by cause of death, such as lava flows or gas.

  5. hawk moth
    Animals

    Flying insects tell tales of long-distance migrations

    Researchers are asking big questions about animal movements and pest control by tracking tiny insects in flight.

  6. illustration of life in the Pliocene
    Earth

    What the Pliocene epoch can teach us about future warming on Earth

    By simulating the changes that occurred during the warm Pliocene epoch, researchers are trying to predict Earth’s future hundreds of years from now.

  7. Luhan Yang
    Health & Medicine

    Luhan Yang strives to make pig organs safe for human transplants

    A bold approach to genome editing by biologist Luhan Yang could alleviate the shortage of organs and ease human suffering.

  8. illustration of seismic waves under a mountain
    Earth

    How earthquake scientists eavesdrop on North Korea’s nuclear blasts

    Researchers monitor the power and location of underground nuclear weapons testing by North Korea.

  9. Lake Huron
    Climate

    Lakes worldwide feel the heat from climate change

    Lakes worldwide are warming with consequences for every part of the food web, from algae, to walleye, to freshwater seals.

  10. illustration of Amasia
    Earth

    Evidence falls into place for once and future supercontinents

    Shifting landmasses have repeatedly reshaped Earth’s surface. Researchers piecing together the past are now picturing a new supercontinent, due in 250 million years.

  11. Ozone hole
    Earth

    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.

  12. Tenio Popmintchev
    Physics

    Tenio Popmintchev fits X-ray laser on a tabletop

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