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In this exclusive TED video, sex ed teacher Al Vernacchio and Make Love Not Porn founder Cindy Gallop discuss why having “the” talk with our kids is not enough.

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Psychologist Guy Winch lays out seven useful ways to reboot emotional health … starting now.

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Figuring out how to walk from A to B is easy in the age of online mapping tools. Just plug in two addresses and off you go. But sometimes getting to a place as quickly as possible isn’t the priority. Take a look at a project in which researchers tried to figure out a city’s “happy” routes.

Cascadia Expeditions' Brett Gallagher and civil engineer Tyler Deboodt photographed in the entrance to Snow Dragon minutes before sunset in July 2013. Says McGregor, he wouldn't be surprised if the cave was destroyed by 2016. Once skylights form, air flows through the cave at an accelerated rate, which weakens the caves' structure and causes them to collapse.

Explorer Brent McGregor shares stunning photographs of glacier caves discovered within the Sandy Glacier on Oregon’s Mount Hood.

For girls in rural Yemen, just getting permission to go to school can be an obstacle. Here, first-graders sit five to a bench. Classrooms often number 150 students to one teacher.

Photographer Laura Boushnak celebrates success stories in women’s education across the Arab World.

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Here’s a treat for Valentine’s Day: Take a close-up look at a decellularized “ghost heart.”

For “New Books of Knowledge” (2009) Dettmer reveals geographic images to show this encyclopedia as a landscape.

Image courtesy of the artist and Packer Schopf.

To create new art, sculptor Brian Dettmer cuts up old books. See a gallery of his intricate, breathtaking creations.