NYT > Science




    New Vaccine Could Slow Disease That Kills 600 Children a Day

    New Vaccine Could Slow Disease That Kills 600 Children a Day


    Laouli Houzeïnatou, 20, and her son, Hanissa Moustaphe, took part in the clinical study of the new vaccine. Laouli was monitored throughout her...

    A lower-cost vaccine provides strong protection against rotavirus, a diarrheal disease, and could be particularly useful in poorer countries, researchers said.
    As Rivals Stand Silent, One Health Insurer Protests G.O.P. Plan

    As Rivals Stand Silent, One Health Insurer Protests G.O.P. Plan


    Dr. J. Mario Molina, chief executive of Molina Healthcare, with a portrait of his father, who founded the company. Dr. Molina has publicly criticized the House health care bill, which he says could strip away coverage for millions of clients and cause...

    Dr. J. Mario Molina, one of the few insurance executives to criticize the House bill publicly, says it could harm insurers and patients alike.
    Arctic’s Winter Sea Ice Drops to Its Lowest Recorded Level

    Arctic’s Winter Sea Ice Drops to Its Lowest Recorded Level


    A research plane surveying ice thickness in the Arctic in August. Much of the ice in the region appears to be thinner than...

    Much of the ice also appears to be thinner than normal — further signs of climate change’s effects on the region.
    Shaking Up the Dinosaur Family Tree

    Shaking Up the Dinosaur Family Tree


    The proposed new family tree of dinosaurs. The group to the left is for close relatives but not true dinosaurs. The old tree grouped the theropods, purple, with the Saurischia, green, and viewed the Saurischia and the Ornithischia as the two major...

    A Ph.D candidate and a computer program that took five minutes to run may upend the dinosaur classification system that has been used for more than a century.
    9 Deaths Are Linked to Rare Cancer From Breast Implants

    9 Deaths Are Linked to Rare Cancer From Breast Implants


    Anaplastic large-cell lymphoma is likelier to occur with textured implants, above, than with smooth implants, the F.D.A....

    The problem is more likely to occur with textured implants than with smooth implants, the F.D.A. said, and it is usually treatable and not often fatal.
    Burrowing Under Luminous Ice to Retrieve Mussels

    Burrowing Under Luminous Ice to Retrieve Mussels


    A snowmobiler made his way across an expanse of ice and tundra in northern Quebec to harvest...

    When the winter tide goes out on a northern Canadian bay, some Inuit clamber into the ice caves below to harvest fresh food.
    Trump Lays Plans to Reverse Obama’s Climate Change Legacy

    Trump Lays Plans to Reverse Obama’s Climate Change Legacy


    A coal-fired power plant in Ghent, Ky. President Trump is expected to order a withdrawal and rewriting of Obama-era regulations intended to shut down hundreds of heavily polluting coal-fired...

    The White House is preparing to dismantle major policy actions of the Obama era, including a plan to close hundreds of heavily polluting power plants.
    News Analysis: An End to Heart Disease? Not Quite

    News Analysis: An End to Heart Disease? Not Quite


    Over about two years of study, researchers found that Repatha, when added to statin therapy, further reduced the risk of heart attack or stroke by about 15...

    The introduction of a new class of cholesterol drugs led some experts to believe that we might be able to virtually eliminate heart attacks. But it hasn’t worked out that way.
    Popular Prostate Cancer Therapy Is Short, Intense and Unproven

    Popular Prostate Cancer Therapy Is Short, Intense and Unproven


    Paul Kolnik, a photographer, underwent stereotactic body radiation therapy for his prostate cancer, which is now in...

    Researchers hope a study will shed some light on a cancer treatment, using radiation, that is growing in popularity and surrounded by questions.
    Take a Number: More Grandparents Than Ever

    Take a Number: More Grandparents Than Ever


    A grandmother and granddaughter at play in Chevy Chase, Md. The number of grandparents in the American population has grown by 24 percent since...

    Since 2001 the number of grandparents has grown by 24 percent, partly as a result of the aging of the baby boom generation.
    The Death and Rebirth of the Duncan Grapefruit

    The Death and Rebirth of the Duncan Grapefruit


    The classic Duncan grapefruit has become virtually impossible to find beyond a few places like Hollieanna Groves in Maitland,...

    Once a breakfast staple, this white, seed-packed variety of the fruit has all but disappeared. Yet there are hints of a small-scale revival.
    We Might Soon Resurrect Extinct Species. Is It Worth the Cost?

    We Might Soon Resurrect Extinct Species. Is It Worth the Cost?


    An illustration of an extinct rat kangaroo, published in 1825. Researchers recently analyzed the costs and benefits of re-establishing and maintaining 16 species in Australia and New Zealand that went extinct in the last...

    Scientists disagree about whether bringing extinct species back from the dead will result in a net loss of global biodiversity.
    Trilobites: Bluebonnet Season Came Early in Texas This Spring

    Trilobites: Bluebonnet Season Came Early in Texas This Spring


    Taking photographs with bluebonnets is “a rite of passage for any Texan,” a photographer...

    Flowering plants that are blue are rare in nature. But Texas bluebonnets put on an annual show in pastures, parks and highway medians.
    Q&A: Animals in Extra Large

    Q&A: Animals in Extra Large


    In general, the large size of some prehistoric animals in comparison to their modern counterparts had to do with evolutionary...

    In general, the large size of some prehistoric animals in comparison to their modern counterparts had to do with evolutionary opportunity.

    U.S. Nuclear Weapons Tests Come to YouTube


    Films of the tests conducted in Nevada and the Marshall Islands from 1945 to 1962 are being restored and released to the...

    Films of the tests conducted in Nevada and the Marshall Islands from 1945 to 1962 are being restored and released to the public.

    Watch U.S. Nuclear Tests


    Thousands of films showing U.S. atmospheric nuclear tests between 1945 and 1962 have been declassified. Scientists are studying them and posting them for all to...

    Thousands of films showing U.S. atmospheric nuclear tests between 1945 and 1962 have been declassified. Scientists are studying them and posting them for all to see.
    With E.P.A. Cuts, States Would Lose Help in Emergencies

    With E.P.A. Cuts, States Would Lose Help in Emergencies


    Coal piles at a Utah power plant regulated by the Environmental Protection Agency. The agency faces the largest cut under President Trump’s...

    Much of the agency’s state-level work would be eliminated or sharply reduced by President Trump’s proposed budget, which cuts the E.P.A. more than any other agency.
    Cholesterol-Slashing Drug Can Protect High-Risk Heart Patients, Study Finds

    Cholesterol-Slashing Drug Can Protect High-Risk Heart Patients, Study Finds


    Robert Johnson 51, with his twin 6-year-old daughters, Brooke, left, and Bobbi on vacation in Florida. Mr. Johnson feared dying young of a heart attack like his father. “I always felt there was a ticking time bomb in my heart,” he...

    Patients who took the drug, Repatha, were significantly less likely to have heart attacks or strokes, researchers concluded. But its high cost will be an issue.
    Scientists Bristle at Trump Budget’s Cuts to Research

    Scientists Bristle at Trump Budget’s Cuts to Research


    A scientist working with the Zika virus at a National Institutes of Health lab in Bethesda, Md., last year. President Trump would cut the budget for the National Institutes of Health by 18...

    Scientists expressed alarm at the depth of proposed cuts to climate change, medical and energy programs, saying they threaten the nation’s research infrastructure.
    Trilobites: Ancestral Climates May Have Shaped Your Nose

    Trilobites: Ancestral Climates May Have Shaped Your Nose


    A study led by Penn State researchers looked at nose shape in people whose parents and ancestors came from four regions of the...

    A study led by Penn State researchers found more evidence of the relationship between nose shape and the climate where a person’s ancestors lived.
    Trilobites: A Search for Clues to What Causes Whale Strandings

    Trilobites: A Search for Clues to What Causes Whale Strandings


    Pilot whales during a mass stranding in New Zealand. Scientists speculate that the large amounts of energy that dolphins and whales expend when fleeing threats may be linked to mass...

    Researchers develop a model they hope can be used to understand how dolphins and whales react physiologically to threats from predators and people.
    Trilobites: How a Water Bear Survives, Even When It’s Dry

    Trilobites: How a Water Bear Survives, Even When It’s Dry


    A scanning electron micrograph of a tardigrade walking over moss. Tardigrades, known as water bears, can endure having their bodies completely dried out, a process called desiccation. The creature pulls its eight legs and head into its exoskeleton and...

    The microscopic animals were found to produce a unique protein that coats the molecules in their cells in a glasslike substance.