Thomas Sumner

All Stories by Thomas Sumner

  1. Earth

    Death by asteroid may come in unexpected ways

    Most deaths from an asteroid impact would likely come from shock waves and winds, not earthquakes and tsunamis. That's the conclusion of new studies. The good news: Such killer space rocks are quite rare.

  2. Planets

    How Earth got its moon

    How did our moon form? Scientists are still debating the answer. It may be the result of some one big impact with Earth — or perhaps many small ones.

  3. Earth

    Is Zealandia a continent?

    Geologists are making the case for a new continent, that they would dub Zealandia. It can be found largely submerged beneath the southwestern Pacific Ocean.

  4. Climate

    Sea ice around Antarctica shrinks to record low

    Just two years after reaching a record high, the Antarctic sea ice extent has reached a new low.

  5. Fossils

    What killed the dinosaurs?

    New evidence is emerging that a devastating combo of events — an asteroid impact and supervolcanoes — may be behind the dinosaurs’ demise.

  6. Earth

    Drilling into a dinosaur killer

    An asteroid that hit the Earth 66 million years ago killed off the dinosaurs. Now scientists are drilling into the giant crater left behind.

  7. Oceans

    Climate change could stall Atlantic ocean current

    Rising carbon dioxide concentrations in Earth’s atmosphere could disrupt the Atlantic Ocean current after all, a new analysis finds.

  8. Climate

    Earth breaks heat record for third year straight

    Climate change and heat from a strong El Niño played roles in making 2016 the hottest year on record.

  9. Oceans

    Massive ice shelf is poised to break off of Antarctica

    A fast-growing crack in Antarctica’s Larsen C ice shelf could soon release a truly huge hunk of ice into the ocean.

  10. Climate

    Feverish climate is melting glaciers, study confirms

    Dwindling glaciers are “categorical evidence of climate change,” a new study affirms.