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  1. Animals

    Butterflies may lose their ‘tails’ like lizards

    Fragile, tail-like projections on some butterflies' wings may be a lifesaver.

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  2. Life

    Lucy Cooke’s new book ‘Bitch’ busts myths about female animals

    Female animals get their due in Lucy Cooke’s exploration of the roles of the sexes in biology and evolution.

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  3. Astronomy

    A celestial loner might be the first known rogue black hole

    The object could be the first isolated stellar-mass black hole identified in the Milky Way — or it might be an unusually heavy neutron star.

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  4. Physics

    Why even small sonic booms are more annoying in cities

    Quieter sonic booms from next-generation planes could still be annoying in cities thanks to narrow streets and tall buildings, simulations suggest.