A new survey finds India's rivers host around 6,327 river dolphins - 6,324 Gangetic and just three Indus dolphins. A majority ...

Examples of convergent evolution include the similarly streamlined teardrop body shape that evolved in ichthyosaurs, sharks, tuna and dolphins — a response driven by natural selection in similar ...

For example, how would a scientist figure out evolutionary relationships between sharks, dolphins and wolves? Two fishy-looking animals and a four-legged, furry one. First we need to find the ...

This story appears in the May 2015 issue of National Geographic magazine. Head trainer Teri Turner Bolton looks out at two young adult male dolphins, Hector and Han, whose beaks, or rostra, are ...