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  1. Astronomy

    Watch the oldest surviving film of a total solar eclipse

    A short film of the 1900 total solar eclipse was restored by conservation experts and is now available to view online.

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  2. Anthropology

    Africa’s first herders spread pastoralism by mating with foragers

    DNA unveils long-ago hookups between early pastoralists and native hunter-gatherers in Africa.

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  3. Health & Medicine

    A fungus weaponized with a spider toxin can kill malaria mosquitoes

    In controlled field experiments in Burkina Faso, a genetically engineered fungus reduced numbers of insecticide-resistant mosquitoes that can carry malaria.

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  4. Chemistry

    Vaping the sweetener sucralose may produce toxic chemicals

    Sucralose in e-liquids can break down, increasing toxic aldehydes in vapors and producing harmful organochlorines, including a potential carcinogen.

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  5. Astronomy

    Questions about solar storms, slingshot spiders and more reader feedback

    Readers had questions about solar storms, a robotic gripper, slingshot spiders and more.

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  6. Health & Medicine

    Resurgence of measles is a tale as old as human history

    Editor in Chief Nancy Shute discusses the recent global measles outbreak and the history of the spread of pathogens.

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  7. Planetary Science

    Icy volcanoes on Pluto may have spewed organic-rich water

    Planetary scientists found ammonia-rich ice near cracks on Pluto, suggesting the dwarf planet had recent icy volcanoes.

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  8. Climate

    Himalayan glacier melting threatens water security for millions of people

    Asia’s glaciers are melting faster than they are accumulating new stores of snow and ice.

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  9. Physics

    In a first, scientists took the temperature of a sonic black hole

    A lab-made black hole that traps sound, not light, emits radiation at a certain temperature, as Stephen Hawking first predicted.

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  10. Physics

    100 years ago, an eclipse proved Einstein right. Today, black holes do too — for now

    In 1919, an eclipse affirmed Einstein’s famous general theory of relativity. Now scientists hope to use black holes to poke holes in that idea.

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  11. Animals

    A 50-million-year-old fossil captures a swimming school of fish

    Analysis of a fossilized fish shoal suggests that animals may have evolved coordinated group movement around 50 million years ago.

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  12. Health & Medicine

    One number can help explain why measles is so contagious

    The basic reproduction number, or "R naught," of measles shows how contagious the disease is compared with other pathogens.

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