Related topics: species · genes · evolutionary biology

Why Female Water Buffalo Have Horns but Impala Do Not?

(PhysOrg.com) -- The reason some female hoofed animals have horns while others do not has long puzzled evolutionary biologists, even the great Charles Darwin. But now a survey of 117 bovid species led by Ted Stankowich, professor ...

Wild mice have natural protection against Lyme borreliosis

Like humans, mice can become infected with Borrelia. However, not all mice that come into contact with these bacteria contract the dreaded Lyme disease: Animals with a particular gene variant are immune to the bacteria, as ...

Research shows male guppies reproduce even after death

Performing experiments in a river in Trinidad, a team of evolutionary biologists has found that male guppies continue to reproduce for at least ten months after they die, living on as stored sperm in females, who have much ...

What makes two species different?

Most evolutionary biologists distinguish one species from another based on reproductivity: members of different species either won't or can't mate with one another, or, if they do, the resulting offspring are often sterile, ...

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