Health
People are seeking sperm donors online, but are the risks worth it?
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This week's magazine
On the cover
Editor's picks
Life
Asking the biggest questions is the very essence of science
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Technology
The truth behind Boston Dynamics' viral robot videos
Features
Life
Life’s secret ingredient: A radical theory of what makes things alive
Features
Environment
This stunning map shows why everyone is fighting over the Arctic
Features
Table of contents
Leaders
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Health
Powerful whole-species gene editing tool fails first tests in mice
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Humans
Africans may have crossed the Strait of Gibraltar 4000 years ago
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Humans
People appear to sleep much better when rocked throughout the night
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Space
The moon’s violent birth may have given Earth the ingredients of life
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Health
Tumour-killing virus could stop a childhood eye cancer and save vision
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Health
Married people have stronger hands than those who are single
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Physics
Megawave recreated in the lab looks just like Hokusai's Great Wave
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Health
We may finally know what causes Alzheimer’s – and how to stop it
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Technology
Terrible drivers could teach autonomous cars how to avoid crashes
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Health
Gum disease may be the cause of Alzheimer's - here's how to avoid it
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Comment
Should we rename some cancers to make them sound less scary?
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Health
Staying slim isn't just about what you eat - it's about your DNA too
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Technology
DeepMind AI thrashes human professionals at video game StarCraft II
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Technology
Battling AI algorithm tested on a quantum computer for first time
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Health
Women could use their own uteruses as incubators for IVF embryos
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Physics
The emptiness of space has a structure we could use to send messages
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Some snails wear jackets made of algae to protect them from the sun
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Humans
Siberian cave reveals secrets of its mysterious Denisovan inhabitants
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