Vol. 195 No. 8 Read Digital Issue Archives

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More Stories from the April 27, 2019 issue

  1. proton spin
    Particle Physics

    How a proton gets its spin is surprisingly complicated

    Pinning down the source of protons’ spin is surprisingly hard to do.

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  2. rhesus macaque
    Health & Medicine

    Saving monkey testicle tissue before puberty hints at a new way to preserve fertility

    Frozen testicle tissue samples from prepubescent monkeys transplanted back onto those monkeys once they matured produced sperm.

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  3. jelly fossils
    Paleontology

    Newfound fossils in China highlight a dizzying diversity of Cambrian life

    A new treasure trove of Cambrian fossils in China dating to 518 million years ago could rival Canada’s Burgess Shale.

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  4. older man exercising
    Health & Medicine

    A single sweaty workout may boost some people’s memory

    Memory improvements after a short bout of exercise mirrored those seen after months of training.

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  5. sperm heading for an egg
    Health & Medicine

    Sperm with damaged DNA may cause some repeat miscarriages

    An analysis of semen from men whose partners have experienced multiple miscarriages revealed abnormalities, a small study finds.

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  6. person sleeping
    Health & Medicine

    Epileptic seizures may scramble memories during sleep

    Overnight seizures seemed to muddle memories in people with epilepsy.

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  7. Kuiper Belt
    Planetary Science

    Kuiper Belt dust may be in our atmosphere (and NASA labs) right now

    Bits of space debris that collect in Earth’s atmosphere may come from as far as the cold, distant Kuiper Belt region beyond Neptune.

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  8. person on dialysis
    Health & Medicine

    Blood vessels built from a patient’s cells could help people on dialysis

    Bioengineered blood vessels could provide a safer alternative than donor vessels or synthetic implants.

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  9. mosquito
    Animals

    Geneticists close in on how mosquitoes sniff out human sweat

    A long-sought protein proves vital for mosquitoes’ ability to detect lactic acid, a great clue for finding a human.

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  10. car engine
    Quantum Physics

    A new quantum engine packs more power than its standard counterparts

    A new type of tiny machine harnesses quantum physics to produce more power than a normal engine, under certain conditions.

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  11. Saturn's rings
    Planetary Science

    Saturn’s rings paint some of its moons shades of blue and red

    Moons located among Saturn’s inner rings are different colors depending on their distance from the planet, suggesting they’re picking up ring debris.

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  12. mossy red-eyed frogs
    Animals

    Chytrid’s frog-killing toll has been tallied — and it’s bad

    Losses due to the amphibian-killing chytrid fungus are “the greatest documented loss of biodiversity attributable to a pathogen,” researchers find.

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  13. Antarctic Peninsula
    Climate

    One Antarctic ice shelf gets half its annual snowfall in just 10 days

    Antarctica’s coasts get most of their snow from just a few big storms each year.

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  14. Denisova Cave
    Anthropology

    The first known fossil of a Denisovan skull has been found in a Siberian cave

    A new fossil and evidence that the hominids interbred with humans as recently as 15,000 years ago only add to Denisovans’ mystery.

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  15. fentanyl
    Health & Medicine

    A single-dose antidote may help prevent fentanyl overdoses

    Packing overdose medication into nanoparticles could help it better counteract dangerous synthetic opioids.

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  16. Animals

    Tiny pumpkin toadlets have glowing bony plates on their backs

    Pumpkin toadlets are the first frogs found to have fluorescent bony plates that are visible through their skin under ultraviolet light.

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  17. Hyksos palace ruins
    Anthropology

    Foreigners may have conquered ancient Egypt without invading it

    Dental evidence suggests female Hyksos immigrants married into power.

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  18. fish fossil at Tanis site
    Paleontology

    New fossils may capture the minutes after the dinosaur-killing asteroid impact

    North Dakota fossils may depict the aftermath of the dinosaur-killing asteroid, but controversial claims about the breadth of the find are unproven.

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  19. neutrophils
    Life

    ‘An Elegant Defense’ explores the immune system’s softer side

    The lives of four people helped or harmed by their body’s natural defenses illustrate why immunology has become one of the hottest fields in science.

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  20. periodic table illustration
    Chemistry

    50 years ago, scientists fought over element 104’s discovery

    A conflict known as the Transfermium Wars marked a contentious struggle over the search for new elements beginning in the 1960s.

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