A viral theory about chronic stress is hitting a nerve—literally—and it might explain why you're always on edge.

it will activate the fight-or-flight response. But if it doesn’t feel like you can fight or flee, the next step is freeze. The nervous system works on a hierarchy. Think of an animal playing dead.

On the flipside of fight-or-flight is rest-and-digest. It’s the body’s way of rebalancing itself after the danger has passed.

Autonomic nervous system articles from across Nature Portfolio The autonomic nervous system is the part of the peripheral nervous system that controls visceral functions such as heart rate ...

The author divides the peripheral nerves into somatic and autonomic, and the latter into sympathetic (thoracico-lumbar, to all regions of the body), enteric (plexuses of Auerbach and Meissner ...

Stress isn't what it used to be. In a world dominated by chronic stress, we can no longer rely on our biological systems, ...

If you’re looking for the Connections answer for Tuesday, June 17, 2025, read on—I’ll share some clues, tips, and strategies, and finally the solutions to all four categories. Along the way ...

One of the most surprising objects observed in X-rays are comets. X-rays are normally associated with the hottest things in the Universe, such as black holes. Comets, however, were described by Fred ...