The population of one of the most common hummingbird species in the U.S. is plummeting. Climate change may be the culprit.
Researchers don’t know enough about the charismatic giraffe—and as populations dwindle, they’re running out of time.
Sharks and rays often have multiple dads per litter, a strategy known as multiple paternity. Now, evolutionary ecologists are trying to understand why.
Es hora de que la legislación y la educación reflejen el sexo como un espectro con opciones ilimitadas.