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We summarize the week's scientific breakthroughs every Thursday.

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  1. Health & Medicine

    Clinical trials face uncertain futures amid Trump cuts

    The Trump administration has reportedly disrupted over 100 clinical trials. Science News spoke to researchers about the impacts on four of them.

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  2. Paleontology

    Could Spinosaurus swim? The fierce dinosaur ignites debate

    Researchers are still divided about whether Spinosaurus was a swimmer or a wader. What’s clear is that confirming the first swimming dinosaur would be a game-changer.

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  3. Health & Medicine

    A shadowy market for weight-loss drugs has emerged online

    People are buying semaglutide and tirzepatide, the key ingredients in Ozempic and Zepbound, from unconventional sources. Doctors have safety concerns.

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  4. Health & Medicine

    6 things to know about antidepressants

    An abundance of data show that SSRIs, a class of drugs commonly used as antidepressants, are effective, though, like any drug, they have risks.

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  5. Health & Medicine

    What experts say about childhood vaccines amid the Texas measles outbreak

    As the Texas measles outbreak grows and HHS head RFK Jr. puts vaccines under new scrutiny, two experts answer questions about the public health tool.

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  6. Artificial Intelligence

    Are AI chatbot ‘personalities’ in the eye of the beholder?

    Defining AI chatbot personality could be based on how a bot “feels” about itself or on how a person feels about the bot they’re interacting with.

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  7. Health & Medicine

    Better male birth control is on the horizon

    Men have two birth control options: condoms and vasectomies. Why has it taken so long to develop more contraceptives?

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  8. Science & Society

    Trump orders sow chaos in global public health 

    A recent flurry of executive orders and surprise actions by the Trump administration have roiled WHO, the CDC and the international public health community.

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  9. Science & Society

    What nuclear weapons experts will watch for under Trump 

    As Trump takes office, issues of arms control, the U.S. arsenal and weapons testing will be on the radar for many nuclear weapons researchers.

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