Nature News
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![[:es]Why schools probably aren’t COVID hotspots[:]](https://katedra.eus/app/uploads/2020/10/d41586-020-02973-3_18510162.jpg)
[:es]Why schools probably aren’t COVID hotspots[:]
Young children are unlikely to spread the virus — but older kids are more at risk, say researchers.
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![[:es]These bizarre ancient species are rewriting animal evolution[:]](https://katedra.eus/app/uploads/2020/10/d41586-020-02985-z_18511484.jpg)
[:es]These bizarre ancient species are rewriting animal evolution[:]
Early fossils with guts, segmented bodies and other sophisticated features reveal a revolution in animal life — before the Cambrian explosion.
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![[:es]This beetle’s stab-proof exoskeleton makes it almost indestructible[:]](https://katedra.eus/app/uploads/2020/10/d41586-020-02976-0_18497448.jpg)
[:es]This beetle’s stab-proof exoskeleton makes it almost indestructible[:]
Jigsaw-puzzle-shaped seams that hold a notoriously tough insect’s wing cases together could inspire engineers.
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![[:es]Universal assembly instructions for the placenta[:]](https://katedra.eus/app/uploads/2020/10/d41586-020-02914-0_18487092.png)
[:es]Universal assembly instructions for the placenta[:]
Our understanding of how mammalian embryos develop is based largely on mice. A study now reveals striking similarities and intriguing differences between mouse, cow and human embryos.
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![[:es]Face masks: what the data say[:]](https://katedra.eus/app/uploads/2020/10/d41586-020-02801-8_18428360.jpg)
[:es]Face masks: what the data say[:]
The science supports that face coverings save lives, and yet the debate trundles on. How much evidence is enough?
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![[:es]Last chance for WIMPs: physicists launch all-out hunt for dark-matter candidate[:]](https://katedra.eus/app/uploads/2020/10/d41586-020-02741-3_18437496.jpg)
[:es]Last chance for WIMPs: physicists launch all-out hunt for dark-matter candidate[:]
Researchers have spent decades searching for the elusive particles — a final generation of detectors should leave them no place to hide.
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![[:es]Alexa, do I have COVID-19?[:]](https://katedra.eus/app/uploads/2020/10/d41586-020-02732-4_18423250.jpg)
[:es]Alexa, do I have COVID-19?[:]
Researchers are exploring ways to use people’s voices to diagnose coronavirus infections, dementia, depression and much more.
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![[:es]Water on Mars: discovery of three buried lakes intrigues scientists[:]](https://katedra.eus/app/uploads/2020/09/d41586-020-02751-1_18423590.jpg)
[:es]Water on Mars: discovery of three buried lakes intrigues scientists[:]
Researchers say they have detected a group of lakes hidden under the red planet’s icy surface.
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![[:es]‘Apocalyptic’ fires are ravaging the world’s largest tropical wetland[:]](https://katedra.eus/app/uploads/2020/09/d41586-020-02716-4_18404590.jpg)
[:es]‘Apocalyptic’ fires are ravaging the world’s largest tropical wetland[:]
Infernos in South America’s Pantanal region have burnt twice the area of California’s fires this year. Researchers fear the rare ecosystem will never recover.