Scientists have long struggled with how to study the gut's vast nervous system—often called the body's "second brain"—without ...

Why do some people sweat more than others? Dr. Shrey Srivastava explains the role of genetics, hormones, body size, and the ...

New research reveals how your vagus nerve, gut microbiome and digital habits shape real, lasting happiness, from your immune ...

What happens is your sympathetic nervous system is activated, pumping adrenaline and glucocorticoid steroids into your system that give you hyper focus, energy, and strength to handle the situation.

But, unlike vertebrate organisms, the octopus’s nervous system is also decentralized, with around 350 million neurons, or 66 percent of it, located in its eight arms.