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On average, two students in every U.S. classroom have ADHD. damircudic/E+ via Getty Images

What causes ADHD and can it be cured?

Even when the condition lasts a lifetime, there are behavioral treatments and prescription drugs that make it easier for people with attention-deficit hyperactivity disorder to thrive.
A volunteer distributes face masks in a rural California community in February 2021. Mel Melcon/Los Angeles Times via Getty Images

Having COVID-19 or being close to others who get it may make you more charitable

Experiments in the US and Italy that observed people’s charitable choices found similar results: People tend to prefer to help local communities.
Your teeth will be better off if you refrain from chomping on ice cubes. Credit: Laurence Monneret/The Image Bank via Getty Images

Is chewing on ice cubes bad for your teeth?

A dentist explains why this is a habit worth breaking – no matter the cause or the strength of your cravings to keep doing it.
Teachers experienced more positive emotions interacting with their students when schools closed during the pandemic. Barrie Fanton/Education Images/Universal Images Group via Getty Images

Teachers say working with students kept them motivated at the start of the pandemic

Teachers’ fondness for working with students grew in the early stages of the pandemic, according to a new study that provides a unique before-and-after glimpse at what duties teachers enjoyed most.
Tiny changes, like a butterfly’s wing flapping, can be amplified downstream in a chaotic system. Catherine Falls Commercial/Moment via Getty Images

What is chaos? A complex systems scientist explains

Part of the 2021 Nobel Prize in Physics was awarded for work modeling Earth’s climate using its chaotic, complex weather. To scientists, chaos lies in the gray zone between randomness and predictability.
Nearly 100 scholars and health care professionals are urging women to limit their use of acetaminophen during pregnancy. Oscar Wong/Moment via Getty Images

Tylenol could be risky for pregnant women – a new review of 25 years of research finds acetaminophen may contribute to ADHD and other developmental disorders in children

Tylenol has long been considered a go-to medication for low to moderate pain and for fever reduction, even during pregnancy. But mounting evidence suggests that it is unsafe for fetal development.
The estimated lifetime costs of antiretroviral therapy for someone who acquires HIV at age 35 is $358,380. YakubovAlim/iStock via Getty Images Plus

Combining an HIV vaccine with immunotherapy may reduce the need for daily medication

People with HIV need to take daily medication to keep the virus at bay. A study has found that a new treatment combination could boost immunity and control virus levels even after stopping medication.

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