Highlights: June 23–29

Here are our top picks of the week, including: How children became children, the poker tell you didn't know about, and how to get a stranger's attention.

The True Cause Of Cruelty, Redux

By Alex Lickerman M.D.
The real reason people treat each other so badly

Hand Movements Give Your Poker Game Away

By Richard E. Cytowic M.D.
The hands, not your face, give your intentions away.

What Should Doctors Do When They Don't Know What to Do?

By Allen J Frances M.D.
Uncertainty certainly beats false certainty.

6 Ways to Get Me to Email You Back

By Adam Grant Ph.D.
How to capture the attention of busy people

Do Parks Make People Happier?

By Art Markman Ph.D.
How does living near urban green space affect your life satisfaction?

When Childhood Was Discovered

By Arthur Dobrin D.S.W.
Childhood didn't always exist.

Are You Introspectively Bi-Curious?

By Jeremy E Sherman Ph.D.
Do you find your inconsistencies interesting or revolting?

Mo' Money, Mo' Problems

By Samantha Joel
How having more money can make you a worse parent