Three things you need to know about this week’s show:

1. You could learn a thing or two from Papua New Guineans. They pay attention when people are talking because they’re not distracted by tech devices and gadgets, says Jared Diamond, author of Germs, Guns and Steel.

2. 3-D printers could become as common as syringes in hospitals. Materials scientist Mark Miodownik sees a day when we’ll be able to print new body parts.

3. Attending your kids’ sports games isn’t helping them. According to investigative journalist Amanda Ripley, American parents are more involved in their kid's schools than ever, but countries with fewer bake sale and room mother requirements actually have higher achieving students.