Contributing editor W. Wayt Gibbs spoke with Arthur Caplan, head of the NYU Grossman School of Medicine’s division of medical ethics, about some of the ethical issues that researchers have to consider in testing and distributing vaccines against COVID-19.

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Journalist and author Emily Anthes talks about her book The Great Indoors: The Surprising Science of How Buildings Shape Our Behavior, Health, and Happiness.

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Journalist Bob Hirshon reports from the Taking Nature Black conference, reporter Shahla Farzan talks about tracking copperhead snakes, and nanoscientist Ondrej Krivanek discusses microscopes with subangstrom resolution.

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Journalist and author Florence Williams talks about her book The Nature Fix: Why Nature Makes Us Happier, Healthier and More Creative.

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Behavioral scientist Stephen Martin and psychologist Joseph Marks talk about their book Messengers: Who We Listen To, Who We Don’t, and Why.

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Biological oceanography expert Miriam Goldstein talks about issues facing the oceans. Reporter Adam Levy discusses air pollution info available because of the pandemic. And astrophysicist Andrew Fabian chats about black holes.

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For the fourth Science on the Hill event, Future Climate: What We Know, What We Don’t, experts talked with Scientific American senior editor Mark Fischetti about what goes into modeling our climate—and how such models are used in addition to long-term climate prediction.

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Stanford University neuroscientist Robert Sapolsky talks about human behavior, the penal system and the question of free will.

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Physicist Brian Keating talks about his book Losing the Nobel Prize: A Story of Cosmology, Ambition, and the Perils of Science’s Highest Honor.

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Astrophysicist and author Mario Livio talks about his latest book, Galileo: And the Science Deniers, and how the legendary scientist’s battles are still relevant today.

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