


How harmful are electronic cigarettes?
The risks of vaping may be worth the benefits
RESTRICTIONS on vaping are multiplying. Belgium banned sales of disposable vapes on January 1st. France adopted a similar law on February 24th. Other bans on “puffs”, as these single-use electronic cigarettes are also known, may soon come into force in England, Scotland, Wales and New Zealand. The latter’s law, which takes effect on June 17th, even prohibits specialist retailers from speaking with existing customers about vaping products. More than 30 countries including Brazil, India and Turkey have outlawed all vaping products. Are such measures justified?
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Why don’t seals drown?
They can time their dives to match their blood oxygen

Rumours on social media could cause sick people to feel worse
They are powerful triggers of an inverse placebo effect

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