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The boa constrictor has developed a way to control air movement in its lungs using ribs in the lower part of its body, so it can breathe while it squeezes the life out of its prey
Some spider species that live in groups of thousands on enormous webs synchronise their movements to catch insects up to 700 times heavier than an individual spider
A 1.4-million-year-old fossil relative of killer whales had teeth that suggest it ate small fish rather than large marine mammals
Sauropods, a group that includes diplodocus, were assumed to walk like elephants, but a new way to analyse footprints shows their gait was most similar to a hippopotamus
An analysis of 1800 mammalian species shows that those in which females suckle not just their young but those of other females in the social group have larger litters