For narwhals, the 'unicorn of the seas,' size matters for sexual selection

Showy peacock feathers, extravagant elk antlers and powerful crayfish claws are just a few examples of the ostentatious animal extremes used to compete for and attract mates, a process called sexual selection.

from Phys.org - latest science and technology news stories https://ift.tt/38TDfoU

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