Nature News
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![[:es]The 2,000 stars where aliens would catch a glimpse of Earth[:]](https://katedra.eus/app/uploads/2021/06/d41586-021-01692-7_19281642.jpg)
[:es]The 2,000 stars where aliens would catch a glimpse of Earth[:]
Scientists searching for extraterrestrial life should narrow their hunt to stars and planetary systems that have an occasional view of the Earth as it passes in front of the Sun.
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![[:es]Mathematicians welcome computer-assisted proof in ‘grand unification’ theory [:]](https://katedra.eus/app/uploads/2021/06/d41586-021-01627-2_19277454.png)
[:es]Mathematicians welcome computer-assisted proof in ‘grand unification’ theory [:]
Proof-assistant software handles an abstract concept at the cutting edge of research, revealing a bigger role for software in mathematics.
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![[:es]Mars helicopter kicks up ‘cool’ dust clouds — and unexpected science[:]](https://katedra.eus/app/uploads/2021/06/d41586-021-01537-3_19242830.gif)
[:es]Mars helicopter kicks up ‘cool’ dust clouds — and unexpected science[:]
Videos of the surprising phenomenon could help researchers to better understand natural ‘dust devils’ blowing across the red planet.
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![[:es]Mysterious fast radio bursts come in two distinct flavours[:]](https://katedra.eus/app/uploads/2021/06/d41586-021-01560-4_19246230.jpg)
[:es]Mysterious fast radio bursts come in two distinct flavours[:]
A trove of new detections suggests that the bursts could be the result of at least two separate astrophysical phenomena.
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![[:es]Landmark Alzheimer’s drug approval confounds research community[:]](https://katedra.eus/app/uploads/2021/06/d41586-021-01546-2_19238646.jpg)
[:es]Landmark Alzheimer’s drug approval confounds research community[:]
Many scientists say there is not enough evidence that Biogen’s aducanumab is an effective therapy for the disease.
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![[:es]Hunting the strongest accelerators in our Galaxy[:]](https://katedra.eus/app/uploads/2021/06/d41586-021-01377-1_19184584.jpg)
[:es]Hunting the strongest accelerators in our Galaxy[:]
Twelve candidates for the most powerful astrophysical particle accelerators in the Milky Way have been detected. This advance will help to uncover the nature of these exotic objects.
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![[:es]How did Neanderthals and other ancient humans learn to count?[:]](https://katedra.eus/app/uploads/2021/06/d41586-021-01429-6_19199268.jpg)
[:es]How did Neanderthals and other ancient humans learn to count?[:]
Archaeological finds suggest that people developed numbers tens of thousands of years ago. Scholars are now exploring the first detailed hypotheses about this life-changing invention.
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![[:es]Hundreds of gibberish papers still lurk in the scientific literature[:]](https://katedra.eus/app/uploads/2021/05/d41586-021-01436-7_19199216.jpg)
[:es]Hundreds of gibberish papers still lurk in the scientific literature[:]
The nonsensical computer-generated articles, spotted years after the problem was first seen, could lead to a wave of retractions.
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![[:es]Limit on lab-grown human embryos dropped by stem-cell body[:]](https://katedra.eus/app/uploads/2021/05/d41586-021-01423-y_19198484.jpg)
[:es]Limit on lab-grown human embryos dropped by stem-cell body[:]
The International Society for Stem Cell Research relaxed the famous 14-day rule on culturing human embryos in its latest research guidelines.