For some of us, it's a turning point ... In a recent video, he delved into the different stages of human maturity. This is, basically, our babydom — where we're all instinct and sensory ...

Rama Singh, an evolutionary biologist at McMaster University, in Canada, thinks that if women keep having babies later in life, another fundamental reproductive stage ... human woman is born with ...

Here's how some scientists think some eyes ... liquid that gave it the convex curvature of the human eye. In fact, eyes corresponding to every stage in this sequence have been found in existing ...