We have long been told a simple story about reward: Dopamine is the "wanting" molecule that drives us toward goals, and opioids are the "liking" molecules that provide the hit of pleasure once we get ...

Why is it that a squirrel may calmly take food from a picnic table while a deer runs as if its life depends on it at the snap ...

Animals that dwell at high altitudes have adapted to cope with low oxygen levels, a condition that damages a vital part of nerve cells ...