What happens to your body when a strange dog barks at you on a walk
Pounding heart, shaky legs, dry mouth: adrenaline explains what a surprise dog does to your body, and a few habits help you settle faster.
Long flights and your body clock: a plain-English guide to getting home well
Awake at 3 a.m. after a long flight? Here's how light, temperature and dry air keep your body clock behind, and how to set up home to help.