It turns out that the overall size of the dodo’s brain, relative to its body mass, is much like its closest living relatives, pigeons. Gold is quick to note, however, that "brain size is definitely not the only indicator of intelligence, but it's a good proxy when you do not have other data on which to rely." And before any urbanites scoff at the mention of pigeons, consider that pigeons are quite intelligent, as evidenced in their ability to be trained. "Being able to communicate effectively with an animal (in this case, in the form of training) does help us think of an animal as more intelligent," says Gold. Does this mean that dodos would have also been smart enough to be trainable? "I think with enough patience and the right attitude, one may have been able to train one."