251 episodios

The BBC brings you all the week's science news.

Science In Action BBC World Service

    • Ciencia
    • 5.0 • 1 calificación

The BBC brings you all the week's science news.

    Out of Africa

    Out of Africa

    The last great "out of Arica" movement of our ancestors swept out of the northeast of the continent 74,000 years ago. Archaeologist John Kappelman of the University of Texas brings us an update to this complex tale in the form of animal carcasses.
    We take a trip to Oxford to meet some of postgraduate researcher Ally Morton-Hayward's archive of preserved brains. Not only is Ally shining a light on these underappreciated brains, she is also using them to unlock a rich treasure-trove of information about our ancestors and how they were preserved.
    How do you develop and promote a vaccine against a widespread but neglected parasite? Maria Elena Bottazzi from Baylor College of Medicine is in India promoting their latest development in creating a hookworm vaccine that works against these life-limiting childhood parasites.
    And, is the Chandra X-Ray Observatory at risk? In a decision that has shocked astronomers, the functioning telescope is on the chopping block because of NASA budget cuts. We hear from Belinda Wilkes of Bristol University about Chandra’s impressive history and why it should keep going.
    Presenter/producer: Roland Pease
    Researcher: Katie Tomsett
    Production co-ordinator: Jana Bennett-Holesworth
    (Image: Sunset in savannah of Africa. Credit: Anton Petrus via Getty Images)

    • 33 min
    Impacts of global warming

    Impacts of global warming

    After a twelve-month set of climate records driven by global warming it is time to take stock of how we’re impacting the planet as a species.
    Coral biologist Kate Quigley, of the Minderoo Foundation and James Cook University, dives into the 8th mass bleaching event at the Great Barrier Reef. We explore how deadly heat stress continues to threaten this underwater paradise and induce mass sickness in the corals that call it home.

    Heading onto land we reunite with Mike Flannigan, Professor of Fire Science at Thompson Rivers University, after a record-breaking Canadian forest fire season in 2023 we ask if conditions are set for a repeat.
    And what about the human cost of these climbing temperatures? In the future 800 million outdoor workers in the tropics may be exposed to intolerable heat stress. However, Yuta Masuda, director of science at the Paul G Allen Family Foundation, advises that options for individual action may be limited for workers to protect themselves.
    One of the driving forces behind a record year of global warming is the now waning El Niño system. With its counterpart, La Niña, due to pick up in 2024, we ask NOAA oceanographer Mike McPhaden what to expect from this transition and if we are headed for a turbulent hurricane season.

    Presenter/producer: Roland Pease
    Researcher: Katie Tomsett
    Production co-ordinator: Jana Bennett-Holesworth
    (Photo: The McDougall Creek wildfire burns in the hills West Kelowna, British Columbia, Canada, on 17 August, 2023. Credit: Darren Hull/ AFP)

    • 28 min
    The first stars in the universe

    The first stars in the universe

    Astronomers using the James Webb Space Telescope think they have seen the glow from the first generation of stars after the Big Bang. Newton Kavli Fellow Hannah Übler discusses.
    The Anthropocene is meant to mean the latest geological era in which humanity is shaping the rocks and environment of our planet. But an unexpected vote by a commission has declined the idea of making this an official definition. Roland hears from one of its leading proponents, geologist Jan Zalasiewicz, about what happened and why it matters.
    And, new research indicates that bumblebees can show each other how to solve puzzles too complex for them to learn on their own. Professor Lars Chittka put these clever insects to the test and found that they could learn through social interaction. How exactly did the experiment work, and what does this mean for our understanding of social insects? Reporter Hannah Fisher visits the bee lab at Queen Mary University in London.
    Plus, the subterranean South American snake, or rather snake-like amphibian, that feeds its hatchlings milk from specially evolved glands. Brazilian biologist Carlos Jared explains more about this species’ nurturing behaviour.
    Presenter: Roland Pease
    Producer: Roland Pease
    Production Coordinator: Jana Bennett-Holesworth
    (Photo: A portion of the GOODS-North field of galaxies, highlighting the galaxy GN-z11, which is seen at a time just 430 million years after the Big Bang. Credit: Nasa/ESA/CSA/B. Robertson (UC Santa Cruz), B. Johnson (CfA), S. Tacchella (Cambridge), M. Rieke (University of Arizona), D. Eisenstein (CfA))

    • 29 min
    One million genomes in two dimensions

    One million genomes in two dimensions

    The All of Us Research Program is undergoing the herculean task of gathering genomic data from over one million people living in the United States, from widely different backgrounds, in the hopes of accelerating health care research. However, within the scientific community many, including Ewan Birney, deputy director general of the European Molecular Biology Laboratory, are concerned that the way some of this data has been framed in a recent paper could reinforce racist beliefs. We also learn about the program and hear a response to the criticism from Josh Denny, the CEO of the All of Us Research Program.
    Over the past two years, a deadly version of bird flu, H5N1, has been spreading around the globe, killing hundreds of thousands of birds and mammals in the process. Isolated from the rest of the world, animals in Antarctica have been safe from the virus so far. But, virologist Antonio Alcamí, who is located on the continents Spanish base, confirms that bird flu has reached them, infecting Antarctic skua seabirds.
    And, on a less serious note, can the smell of a female cause premature death? Maybe in mice. Researcher Mike Garratt goes over the intriguing results in his new mouse study.
    Presenter: Roland Pease
    Producer: Ella Hubber
    Production co-ordinator: Jana Bennett-Holesworth
    (Image: Colorful diverse crowd in modern collage. Credit: Dedraw Studio via Getty Images)

    • 26 min
    Largest ever covid safety study

    Largest ever covid safety study

    A monumental Covid vaccine safety study of 99 million vaccinated people confirms just how rare adverse effects are and combats growing vaccine misinformation. Co-director of the Global Vaccine Data Helen Network goes through the results of this massive study.
    This week, Science in Action is bringing you not one, but two extraordinary astronomical discoveries. First, Webb Fellow Olivia Jones on the star hidden in the heart of only supernova visible from Earth. Second, astrophysicist Samuel Lai on what is possibly the brightest object in our universe – a whopping 500tn times brighter than our sun – a star eating quasar.
    And Roland chats with biologist Charlotte Houldcroft who was one of the first to blow the whistle on an absurd, AI generated image which somehow made it through the peer review process.
    Presenter: Roland Pease
    Producer: Ella Hubber
    Production Coordinator: Jana Bennett-Holesworth
    (Image: A health worker injects a man with a shot of the Inavac vaccine for Covid-19. Credit: BAY ISMOYO/AFP via Getty Images)

    • 29 min
    Climate scientist wins defamation case

    Climate scientist wins defamation case

    High-profile climate scientist Michael Mann has been embroiled in a 12-year battle against conservative commentators who claimed his data was fraudulent. Last week, he was awarded $1m in a defamation lawsuit. Michael joins Science in Action to discuss the case and the impact it may have.
    Also, this week, Karyn Rode from the US Geological Survey has been using cameras on collars to track polar bear movement and diet. She tells Roland how the data reveals the devastating effect of sea ice loss on the bears.
    Widescale blackouts in Africa, known as loadshedding, are getting worse. Chemist and winner of The Royal Society Rising Star Africa Prize 2023, Wade Peterson, has an innovative chemical solution to the problem.
    And using a forest to detect the most violent astrophysical sources in our universe? Physicist Steven Prohira thinks it’s possible.
    Presenter: Roland Pease
    Producer: Ella Hubber
    Production Coordinator: Jana Bennett-Holesworth
    (Image: Dr. Michael E. Mann is seen outside of the H. Carl Moultrie Courthouse on February 5, 2024 in Washington, DC. Credit: Pete Kiehart for The Washington Post via Getty Images)

    • 26 min

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