Science + Tech – Articles, Analysis, Opinion

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Some molecules have ‘mirror images,’ and while one form can be helpful, the other can be harmful. BSIP/UIG Via Getty Images

Many drugs have mirror chemical structures, one helpful and the other harmful – a Nobel‑winning discovery allows chemists to make either on demand

From thalidomide to resveratrol, molecules with the exact same chemical properties can have drastically different effects in the body depending on how they’re arranged in space.
Your body retains the benefits of exercise even when you need to hit pause. Williams+Hirakawa/The Image Bank via Getty Images

Your cells keep a record of every workout you’ve ever done – and those gains persist even after a break from exercise

‘Use it or lose it’ isn’t quite true when it comes to the health benefits of exercise. Cells across the body retain a memory of training that lasts longer than once thought.
People may quash their own beliefs to fit in with what they think the group believes. Andrew Lichtenstein/Corbis News via Getty Images

Dozens of men failed to stop an alleged gang rape at Cornell – here’s the misperception that keeps bystanders from intervening and how to short‑circuit it

People may accept bad behavior – even sexual assault – when they overestimate how acceptable their peers think it is. But there are ways to undermine this thinking and make intervention more likely.
A woman views a manipulated video in January 2019 that changes what is said by President Donald Trump and former President Barack Obama, illustrating how deepfake technology can deceive viewers. Robe LeverAFP via Getty Images

As AI political deepfakes go viral, lawmakers struggle to keep up – 2 states’ laws show limits of what they can do

Most states require warnings on AI-generated political ads, but studies show these disclosures do little to alter people’s willingness to share the content. Most states have legislated election deepfakes by requiring a warning 28 states require disclosures on the media