


Distrust in public-health institutions is not just an American problem
Across the rich world politics is driving scepticism
EARLIER THIS month, Robert F. Kennedy junior, America’s health secretary, removed the panel of 17 experts who decide the country’s vaccination guidelines. He later replaced them with eight of his own picks (one has since withdrawn), several of whom are vaccine sceptics and scientists without expertise in the field of vaccine research.
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This article appeared in the Science & technology section of the print edition under the headline “Beyond doubt”

Scientists have created healthy, fertile mice with two fathers
Bipaternal human children, though, are still far away

Killer whales appear to craft their own tools
One group uses kelp stalks as exfoliating brushes

A new telescope will find billions of asteroids, galaxies and stars
The Vera Rubin Observatory captures unprecedented detail
Do longevity drugs work?
Animal studies suggest rapamycin is as effective as long-term fasting
Climate change will hurt the richest farmers—and the poorest
Even with realistic adaptation, crop yields will fall as temperatures rise
How to find the smartest AI
Developers are building fiendish tests only the best models can pass