Biological factors shape sexual preference.
For a long time, friendships between gay men and straight men – what some now call “bromosexual” friendships – were uncommon.
A male penguin pair in a Danish zoo took a chick from a negligent opposite-sex couple in their habitat.
Teenagers aren’t the only ones who wake up wet.
The science behind why so many women want to befriend gay men.
Archaeologists discovered a tomb in Egypt that they believe could belong to Alexander the Great.