Life

  1. Life

    A distant cousin of jellyfish may survive without working mitochondria

    A tiny creature that parasitizes salmon is the first known multicellular eukaryote without a mitochondrial genome, a hallmark of complex life.

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  2. Homo erectus skull
    Humans

    The earliest known hominid interbreeding occurred 700,000 years ago

    The migration of Neandertal-Denisovan ancestors to Eurasia some 700,000 years ago heralded hookups with a resident hominid population.

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  3. Life

    How African turquoise killifish press the pause button on aging

    The fish’s embryos can enter a state of suspended growth to survive dry spells. A study shows that state protects them from aging, and hints at how.

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  4. Podarcis muralis
    Life

    A new lizard parasite is the first known to move from mom to baby

    Nematodes were found living in a lizard’s ovaries and the braincase of her embryos — the first evidence of a reptile parasite that jumps generations.

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  5. Olm salamander in cave
    Animals

    One blind, aquatic salamander may have sat mostly still for seven years

    Olms may live for about century and appear to spend their time moving sparingly.

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  6. Cutting up live human brain tissue
    Neuroscience

    Living brain tissue experiments raise new kinds of ethical questions

    An ethicist describes the quandaries raised by working with tissue involved in human awareness.

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  7. Prometheoarchaeum syntrophicum
    Life

    Microbiologists took 12 years to grow a microbe tied to complex life’s origins

    Years of lab work resulted in growing a type of archaea that might help scientists understand one of evolution’s giant leaps toward complexity.

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  8. Brazil soldiers meet plane of people from Wuhan, China
    Health & Medicine

    Coronavirus’s genetic fingerprints are used to rapidly map its spread

    Fast and widespread scientific data sharing and genetic testing have created a picture of how the new coronavirus spreads.

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  9. Cope's vine snake
    Animals

    Snakes suffered after a frog-killing fungus wiped out their food

    A frog-killing fungus that swept through Panama had a hidden effect. A new study finds that snake diversity declined post-fungus at one field station.

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  10. an Upside-down jellyfish
    Animals

    Jellyfish snot can sting swimmers who never touch the animal

    Researchers have found mobile cellular blobs coated with stinging cells in mucus from a jellyfish that sits upside-down on the seafloor.

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  11. cat smizing
    Animals

    With a litter of tactics, scientists work to tame cat allergies

    New research may reduce the allergen levels of house cats or make people less reactive to our feline friends.

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  12. Mende people in Sierra Leone
    Humans

    Some West Africans may have genes from an ancient ‘ghost’ hominid

    A humanlike population undiscovered in fossils may have passed helpful DNA on to human ancestors in West Africa starting as early as 124,000 years ago.

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