A George Mason University (GMU) biologist proposed an alternate theory of how the common cuckoo bird mimics other birds’ egg colorings at a biology department seminar Jan. 15. Hanley said cuckoos are ...

According to a new study, the first louse to take up residence on a mammalian host likely started out as a parasite of birds. That host-jumping event tens of millions of years ago began the long ...

Females often choose their mates, instead of mating at random, even when a father contributes nothing but genes to his offspring. Costly female preferences for males with exaggerated traits that ...

Researchers studied two Colombian villages and discovered that the risk of gastric cancer (caused by Helicobacter pylori bacteria) depends on both the ancestry of the person and the ancestry of the ...

AbstractThe evolution of reproductive isolation among populations is often the result of selective forces. Among those, parasites exert strong selection on host populations and can thus also ...

UCSC researchers collected scent compounds from woodland star flowers at field sites across the western United States. (Photo by Magne Friberg) Greya politella Two closely related moth species ( above ...