In honor of fathers, here are some fun examples of dads in nature. Marmoset dads do most of the work caring for their twins or triplets - moms just nurse them. Seahorse dads and Rhea dads (ostrich-like birds) incubate their eggs. And Emperor pengin males huddle together around eggs to keep them warm. Visit our Cool Green Science blog (blog.nature.org) to see more examples of great Dads.
Photos Left to Right: Common marmoset, Nortondefeis/Wikimedia Commons; Longsnout seahorse, Jeff Yonover; Greater rhea, Eye on the Globe/Wikimedia Commons; Emperor penguin, Christopher Michel/Flickr