altruism

A surrogate parent feeding a Seychelles warbler chick. Credit: Sjouke Kingma

Some Birds Have Babysitters – but Why Are Babysitters Available in the First Place?

An eclipse. Credit: gsfc/Flickr, CC BY 2.0

Infinite in All Directions: String Wars, Ledecky’s Success and Subatomic Puzzles

One killer whale from a pod hunting a crabeater seal on an ice floe when a pair of humpbacks (one in the foreground) charged in and drove off the killer whales. Credit: Robert L. Pitman

How Humpback Whales Save Other Mammals from Being Hunted

Is Religion Making Our Kids Less Altruistic?