Left or right handed?

During mammalian embryogenesis, determination of three body axes takes place. First, the embryo assumes an AP axis, soon to be followed by the development of the dorsal-ventral axis. Then, after quite a delay, the third and final symmetry break happens: that between left and right. The node coordinates determination of the left-right body axis. Read more


When one thinks of the implications of being a righty or a lefty, writing comes to mind pretty quick.

Did you ever consider eye dominance? When you take a picture, you bring the camera towards one eye so you can truly see what you want to photograph.  Read more