brain

Because both the brain and skin develop from the same embryonic layer called the ectoderm, the scientists set out to explore how these two systems might be connected.

Social interactions prompt the brain to release “rewarding chemicals,” which is why engaging with others feels intrinsically pleasurable rather than burdensome.

My younger sister died of a brain tumor.

It’s like a meditation — I know that sounds crazy, but in that space, something takes over that isn’t my own brain and it’s this wonderful holiday.”

Regularly consuming an addictive substance then causes a rewiring of several important brain systems, leading the person to crave more and more of it.