Life
Female mammals that suckle another鈥檚 young have more offspring
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
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Life
Guppy fish can see optical illusions – but not in the same way we do
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Rats can track the passage of time and judge their accuracy
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Orangutans can learn how to use stone tools as hammers and knives
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Australian raspy cricket has the strongest bite of 650 insect species
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Fear of predators means sparrows struggle to raise chicks to adulthood
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Chimpanzees spotted apparently using insects to treat their wounds
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Learning styles in fruit flies may not be related to nature or nurture
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Female baboons that had a tough infancy are less sociable as adults
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Giant pandas more likely to reject cubs after artificial insemination
Conservationists have used artificial insemination to help increase giant panda populations, but figures from decades of births show that panda mothers are less likely to care for cubs born this way
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Hibernating ground squirrels recycle urine to maintain their muscles
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Largest ever fish colony hosts 100 billion eggs under Antarctic ice
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What dolphins reveal about the evolution of the clitoris
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Fairywren birds can nest out of breeding season to boost numbers
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