Pia mater (Innermost): The pia mater, or innermost membrane, follows the shape of the brain, and lines the spine. It consists of two layers: the outer (epipial) and inner (intima pia).

According to Layer’s founder, Benjamin Hubert, ‘PiA was born from a desire to bring emotion to artificial intelligence. In a world where AI is often feared, we believe that fear is rooted in its ...