While it has long been theorized that fishes swim in schools to conserve energy through neighbor-induced flows, as with flocks of birds, the use of robot fishes provides the first conclusive evidence.
In science, there is a term for the notion that breeding out aggression in animals affects their evolution - "domestication syndrome" - and might explain some of the marmoset monkeys' physical traits.
A new study reveals that carnivores living near humans get up to half of their diets from the same food as humans, threatening the ecosystems dominated by carnivores in North America.