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The Economist
19 Mar 2025
Science & technology | Hear no evil
Rumours on social media could cause sick people to feel worse
They are powerful triggers of an inverse placebo effect
THE PLACEBO effect is a well-known example of the brain’s power over the body, allowing people who are poorly or in pain to improve if they are led to believe they are being treated. The opposite, however, is also possible: patients who believe that procedures will cause them to suffer ill effects can make themselves worse.
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Can people be persuaded not to believe disinformation?
AI chatbots and critical thinking courses might help
Do viruses trigger Alzheimer’s?
A growing group of scientists think so, and are asking whether antivirals could treat the disease
What is the best way to keep your teeth healthy?
Tooth-brushing reigns supreme. But fluoride in tap water is a good safety net
Ukraine’s embrace of drone warfare has paid off
Two new reports highlight strengths as well as weaknesses
The race is on to build the world’s most complex machine
But toppling ASML will not be easy
Want even tinier chips? Use a particle accelerator
High-speed electrons can etch nano-scale designs