Any gym-going female human knows just how much men like to show off their muscles. But it turns out that it’s not just male humans who think that flexing their biceps at ladies is an effective ...

Halle Berry stunned her fans by flexing her biceps in her latest Instagram post, which caught them off guard. Last month, Berry had stirred up excitement with her bikini photos in a scenic sandy ...

Editor's Note: This article was provided by The Conversation. The original is here. A male kangaroo’s forearm size could be a sexually selected trait and help them find a mate, a new study has found.