Picky female sparrows may be more unfaithful

Picky female sparrows may be more unfaithful, new Imperial research suggests. Cheating on social partners is common in birds, and there are clear benefits to males who can raise more offspring without investing in their care. ...

Preferred traits vary depending on short or long-term relationship

A study by researchers at the University of Arkansas confirms previous work showing that women prefer physical strength—upper-body strength, specifically—in short-term contexts, but find that affiliative—or benevolent—humor ...

Twisted-wing parasites feel no pain

Reproduction in the insect order Strepsiptera—also known as twisted-wing parasites—is not for the fainthearted. To inseminate the eggs of its partner, the male partner injures the "neck" of the female with its hook-shaped ...

Female monkeys with female friends live longer

Female white-faced capuchin monkeys living in the tropical dry forests of northwestern Costa Rica may have figured out the secret to a longer life—having fellow females as friends.

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