Life
Sex may have evolved as a way to pool resources during tough times
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Discover the latest science and technology news from around the world with 51¶¯Âþ. Read exclusive articles and expert analysis on the newest developments in space, physics, health, technology, the environment and more.
Technology
Experts say US flights are safe now but flag warning signs to look for
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Health
The US may start vaccinating chickens and cows against bird flu
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Life
Birds' nests in Amsterdam are made up of plastic from 30 years ago
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Technology
Lasers can help detect radioactive materials from afar
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Space
Two huge black holes merged into one and went flying across the cosmos
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Mind
Do we all see red as the same colour? We finally have an answer
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Environment
Global sea ice levels just hit a new record low
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Health
Men taking antibiotics could cut rates of bacterial vaginosis in women
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Physics
Quantum disorder is dependent on who is looking for it
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Health
Norovirus vaccine pill shows promise against 'winter vomiting' bug
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Physics
Light has been transformed into a 'supersolid' for the first time
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