Study Explains Evolution Phenomenon That Puzzled Darwin
Tuesday, November 29, 2016 - 19:31
in Biology & Nature
Why do some animals have extravagant, showy ornaments -- think deer antlers, peacock feathers and horns on beetles -- that can be a liability to survival? Northwestern University researchers have a possible explanation for this puzzling phenomenon of evolution. Their new mathematical model reveals that in animals with ornamentation, males will evolve out of the tension between natural selection and sexual selection into two distinct subspecies, one with flashy, "costly" ornaments for attracting mates and one with subdued, "low-cost" ornaments.