While some world leaders resist global cooperation, city leaders are working across borders to tackle big issues like global warming, immigration and terrorism, says urban expert Robert Muggah.

Artist Janne Willems has collected more than 11,000 drawings in 30 countries from strangers showing the moments we remember and treasure.

Many people want to help in the ongoing struggle for equality and equity, but they don’t know what to do. Activist DeRay Mckesson explains how we can all show up and stand up.

We should all feel empowered to take steps to keep our brains and bodies healthy, says neuroscientist and novelist Lisa Genova.

Power doesn’t just come from having money or lifting weights — you can gain strengths and abilities you didn’t know you had from fantasy role-playing games, says writer Ethan Gilsdorf.

Clinical psychologist Meg Jay shares practical ways to overcome whatever life throws your way.

By joining the Beacon Hill Village in Boston, older people commit to helping each other while they stay in their own homes. And they have plenty of fun while doing it, says MIT AgeLab director Joseph F. Coughlin.