Nature News
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![[:es]Google revives controversial cold-fusion experiments[:]](https://katedra.eus/app/uploads/2019/05/d41586-019-01683-9_16747656.jpg)
[:es]Google revives controversial cold-fusion experiments[:]
Researchers tested mechanisms linked to nuclear fusion at room temperature — but found no evidence for the phenomenon.
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![[:es]Billion-year-old fossils set back evolution of earliest fungi[:]](https://katedra.eus/app/uploads/2019/05/d41586-019-01629-1_16741072.jpg)
[:es]Billion-year-old fossils set back evolution of earliest fungi[:]
Microscopic specimens discovered in the Canadian Arctic are surprisingly intricate.
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![[:es]Anthropocene now: influential panel votes to recognize Earth’s new epoch[:]](https://katedra.eus/app/uploads/2019/05/d41586-019-01641-5_16738012.jpg)
[:es]Anthropocene now: influential panel votes to recognize Earth’s new epoch[:]
Atomic Age would mark the start of the current geologic time unit, if proposal receives final approval.
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![[:es]Physical kilogram is officially dead[:]](https://katedra.eus/app/uploads/2019/05/d41586-019-01614-8_16735558.jpg)
[:es]Physical kilogram is officially dead[:]
Definitions of four basic scientific units, including the kilogram and the kelvin, now rely on fundamental constants rather than arbitrary measures.
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![[:es]The trickster microbes that are shaking up the tree of life[:]](https://katedra.eus/app/uploads/2019/05/d41586-019-01496-w_16719666.gif)
[:es]The trickster microbes that are shaking up the tree of life[:]
Mysterious groups of archaea — named after Loki and other Norse myths — are stirring debate about the origin of complex creatures, including humans.
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![[:es]AI can now defend itself against malicious messages hidden in speech[:]](https://katedra.eus/app/uploads/2019/05/d41586-019-01510-1_16711526.jpg)
[:es]AI can now defend itself against malicious messages hidden in speech[:]
Computer scientists have thwarted programs that can trick AI systems into classifying malicious audio as safe.
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![[:es]Humans are driving one million species to extinction[:]](https://katedra.eus/app/uploads/2019/05/d41586-019-01448-4_16691160.jpg)
[:es]Humans are driving one million species to extinction[:]
Landmark United Nations-backed report finds that agriculture is one of the biggest threats to Earth’s ecosystems.
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![[:es]Permafrost collapse is accelerating carbon release[:]](https://katedra.eus/app/uploads/2019/04/d41586-019-01313-4_16675748.jpg)
[:es]Permafrost collapse is accelerating carbon release[:]
The sudden collapse of thawing soils in the Arctic might double the warming from greenhouse gases released from tundra, warn Merritt R. Turetsky and colleagues.
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![[:es]Brain signals translated into speech using artificial intelligence[:]](https://katedra.eus/app/uploads/2019/04/d41586-019-01328-x_16672812.jpg)
[:es]Brain signals translated into speech using artificial intelligence[:]
Technology could one day be used to help people who can’t talk to communicate.
