DR. ROMANES, in his “Animal Intelligence,” p. 254, says that, “frogs seem to have definite ideas of locality.” This matter appears to have been noticed of old by the Japanese and Chinese ...

Scientists are re-examining what signs of intelligence mean for animals. Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday. Search for: ...

Ants in the genus Brachymyrmex have a 1:8 brain-to-body-mass ratio. (Image credit: vinisouza128 / 500px via Getty Images) Just as absolute brain size isn't a good predictor of animal intelligence ...