The human experience is driven not just by the natural processes that shape our minds, bodies and world, but also by our ability to understand and shape those processes. From good health to terrible disease, from the foods we eat to the drugs we take, and from simple psychology to the the complexity of consciousness.
Researchers found a "ghost population" that interbred with the ancestors of modern humans.
A new paper shows just how diverse the biochemicals in our food are, and how hard it is to understand how they impact our bodies.
Unvaccinated children who contracted the illness lost their immunity to many other infections.
Despite high-profile study, the ancestors of humans living today likely evolved in many places at once, say critics.