Twice as many soldiers died from disease than battle injuries during the American Civil War. Dysentery and chronic diarrhea were so prevalent that there was an honor code among soldiers – you couldn’t shoot a man while he was pooping.  (, , )

In Brazil, the dolphins that team up with local fishermen have their own accent. For over 160 years, wild dolphins have been helping humans catch more fish by signaling when they should cast their nets. Because they use their own unique whistles even around other dolphins, scientists think they may be trying to distinguish themselves as ‘the ones who help humans.’  (, , )