A single gene in the shorebird species known as ruffs controls the levels of testosterone in males, and this in turn affects ...

Alabama and other Republican-led states push to enact more laws this year to legally define two sexes based on observations ...

Marmalade hoverflies leave northern Europe each autumn to escape the cold winter. A study, by the University of Exeter, ...

Just like in “When Harry Met Sally”, the answer isn’t so simple for Kinda baboons, which form long-term friendships between the sexes.

While most animals reproduce sexually, some species rely solely on females for parthenogenetic reproduction. Even in these ...

A new study observed Amazon river dolphins for 218.9 hours and saw males spurt urine into the air 36 times—proof that the behavior is more common than we thought.

Researchers looked at what triggers 'the ick' — the disgust a person feels towards someone they used to find attractive — and ...

New research at the UO reveals that they have been using one that has existed for 480 million years. The octopus has just ...

Globally, primary, and secondary school enrollment rates are getting closer to equal for girls and boys (92% male, 90% female). But while enrollment rates are similar – in fact, two-thirds of all ...

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