New research reveals older singing male whales are increasingly successful at siring offspring compared to younger males.
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An international research team found that butterfly caterpillars use sophisticated rhythmic signals to communicate with ants.
Australian researchers found that human penis size influences both female attraction and male assessment of rivals.
Belugas are harder to study than most whales as they spend so much time under the Arctic ice.
The sound of tawny owls makes the red-breasted birds eat less during their southward migration.
They believe their findings can improve the future welfare of the iconic mammals when held in captivity.
Elephant seals recognize and remembering individuals they had met the year before.
A new study has the clearest evidence yet that territorial expansion after lethal conflict can directly boost reproductive success.
They explained that in the ruthless world of parasitic ants, taking over a host colony is a matter of life and death.