Transgender and gender-fluid teens, particularly those born male, face up to three times more mental and physical abuse at school and at home than their gender-conforming peers, according to a new study.

This week, we chat about why people are nice to each other—does it feel good or are we just avoiding feeling bad—approaches to keeping arsenic out of the food supply, and using artificial intelligence to figure out what a chemical smells like to a human nose with Online News Editor David Grimm. And Stephen Brusatte joins Alexa Billow to discuss why dinosaurs evolved wings and feathers before they ever flew. And in the latest installment of our monthly books segment, Jen Golbeck talks with Bill Schutt, author of Cannibalism: A Perfectly Natural History.  

Listen to previous podcasts.

[Image: Todd Marshall; Music: Jeffrey Cook]

Women actively infected with genital herpes during early pregnancy had twice the odds of giving birth to a child later diagnosed with autism spectrum disorder, according to a new study.

A nationwide analysis suggests same-sex marriage policies were associated with a reduction in suicide attempts by adolescents.