http://www.slate.com/articles/podcasts/working/2015/05/adam_davidson_and_david_plotz_discuss_what_it_s_like_to_start_new_adventures.html
Listen to this episode of Working with David Plotz:
http://www.slate.com/articles/video/video/2015/05/animal_empathy_testing_rats_with_water_and_chocolate_video.html
Researchers created a box divided by a clear plastic partition—a pool of water on one side, a dry platform on the other. They then threw a piece of chocolate into the mix, to test if rats’ altruism was greater than their sweet tooth.