March 18 (UPI) --The unicorn-like tusk of the narwhal whale is an element in sexual selection, and size matters, a study published on Wednesday indicates. The male narwhal, which typically grows to ...

Narwhals are often referred to as the ‘unicorns of the sea’ because of the unicorn-esque tusks they grow on their heads. There’s no question that the narwhal’s discernible tusk makes it one of the ...

A new study suggests that narwhal tusk size is indicative of testicle size and fertility. Narwhals' tusks, which are actually single teeth atop their heads, are directly correlated to teste mass, ...

For one of the most mysterious animals in the oceans, size really does matter. That's the upshot of a new study that finally answers why, unlike every other whale alive today, narwhals evolved their ...

A ballsy new study may have unlocked the secret behind narwhals’ unicorn-like tusks, or the single tooth found atop males’ heads. Researchers studied the testicle size of 144 narwhals collected during ...

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 ...

Male narwhals with the biggest tusks are more attractive to females, scientists have discovered. Those with the largest tusks, which are actually overgrown teeth, are also more successful at fending ...

For a whale of a good time, size does matter! Scientists have discovered that male narwhals use their horns as “sexual weapons” to lure the ladies — with frisky females preferring to hook up with ...