News
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PhysicsThe fastest way to heat certain materials may be to cool them first
A theoretical study reveals that, in certain situations, some materials might heat up more quickly after first being cooled.
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AnimalsJellyfish 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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HumansSome 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.