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Science

Highlights

  1. PhotoA blue-and-yellow macaw that is definitely about to leave some morsels on the ground.
    CreditMohammed Saber/EPA, via Shutterstock

    Trilobites

    Why Do Parrots Waste So Much Food?

    The behavior is so consistent across species and in the wild that some scientists think it must be intentional.

  2. PhotoOne of several sites in Ethiopia’s Danakil Depression, where a team of scientists sought microorganisms able to endure harsh living conditions.
    CreditBelilla, J., Moreira, D., Jardillier, L. et al.

    Trilobites

    They Didn’t Find Life in a Hopeless Place

    In some of the world’s saltiest, most acidic bodies of superheated water, even the most extreme forms of archaea couldn’t survive.

  3. PhotoReleasing blood after leech therapy in Srinagar, Indian-administered Kashmir, last year.
    CreditYawar Nazir/Getty Images

    Meet the Bloodsuckers

    Vampires get all the attention at this time of year, but bloodthirsty leeches, insects and birds are just as compelling — and they’re real.

Trilobites

More in Trilobites »
  2. PhotoA shore crab with a long memory.
    CreditSwansea University

    Happy as a Crab That Just Finished a Maze

    Crustaceans experienced in running a labyrinth made it to the finish line — and their prize — without wrong turns.

  4. PhotoThe mapwing butterfly. A new study has found that butterflies evolved from moths some 98 million years ago, about 50 million years before echolocating bats appeared.
    CreditAkito Y. Kawahara

    How the Butterfly Discovered Daylight

    Nocturnal moths evolved into daytime butterflies not to escape bats, as biologists once thought, but to enjoy an abundant new drink: the nectar of flowering plants.

  1. Her Illness Was Misdiagnosed as Madness. Now Susannah Cahalan Takes On Madness in Medicine.

    “The Great Pretender,” the new book by the author of “Brain on Fire,” is another medical detective story, but this time the person at the heart of the mystery is a doctor, not a patient.

    By Emily Eakin

  2. Victoria Braithwaite, Researcher Who Said Fish Feel Pain, Dies at 52

    In two papers and a book, Dr. Braithwaite made the case that fish react to unpleasant stimuli and argued that they be treated humanely.

    By Cornelia Dean

  3. Sheldon Breiner, 82, Dies; Used Magnetism for Explorations

    He developed the techniques he used to help locate sunken submarines and enormous stone heads, as well as early applications for artificial intelligence.

    By Daniel E. Slotnik

  4. Essay

    Our Hospital’s New Software Frets About My ‘Deficiencies’

    But the patient records system, called Epic, has a few shortcomings of its own, including a voice that amplifies the insecurities that come with being a doctor.

    By Emily Silverman, M.D.

  5. Trump to Nominate Stephen Hahn, Cancer Researcher, to Head F.D.A.

    In choosing him, President Trump is passing over the acting F.D.A. commissioner, Norman E. Sharpless, who has been running the agency since Scott Gottlieb resigned last spring.

    By Katie Thomas

  6. Studies Yield ‘Impressive’ Results in Fight Against Cystic Fibrosis

    The findings hold promise for a vast majority of those with cystic fibrosis, according to the director of the National Institutes of Health. “This should be a cause for major celebration,” he wrote.

    By Niraj Chokshi

  7. Measles Makes Your Immune System’s Memory Forget Defenses Against Other Illnesses

    New research shows the virus can have devastating effects on the immune system that persist much longer than the illness itself.

    By Denise Grady

  8. Spain Agrees to Host Key Climate Talks After Chile Pulls Out

    Madrid has offered to hold the next United Nations climate talks, the leaders of Spain and Chile announced on Thursday.

    By Somini Sengupta

  9. White House Pressed Car Makers to Join Its Fight Over California Emissions Rules

    Monday’s surprise move by G.M., Toyota and other car makers to back President Trump in his fight with California over pollution rules followed calls from the White House.

    By Coral Davenport and Hiroko Tabuchi

  10. In the Fight Against Climate Change, Not All Forests Are Equal

    A new study on the carbon impact of forest loss suggests a new target: preserving forests where deforestation and degradation haven’t yet begun.

    By Henry Fountain