New reseearch could upend ideas about how geography affects sex determination in painted turtles.

"We need to look at the biological factors that are making females more vulnerable to life-saving radiation treatment."

Striped maple trees have a rare ability: to switch from one sex to another.

New research suggests an estrogen receptor could offers therapies to prevent obesity.

External factors like heat and exhaustion aren't the sole causes of fainting. Your genes play a role too, researchers report.

Sleep and exercise may affect depression differently in men and women, researchers say.

"As we get a better sense of what makes flowers attractive to different kinds of bees, maybe we can get smarter about bee conservation."

"We are just starting to understand and study the ways in which gender identity, rather than sex, may cause the brain to differ in males and females..."

"In a nutshell, the showiest males have the smallest testes."

"The misperception was that they would potentially fatigue faster and become a safety risk to other drivers.... I'm here to say that's just not true."