Many people find that their sleep and moods are linked to the seasons. Those living in temperate zones may feel like hibernating in winter and staying out all night in summer, though even those in the tropics can be affected by changing seasons. That’s because we are seasonal animals and adjust our behaviour according to cues from the environment.
Now, it turns out that our ancient adaptation to the seasons also affects our ability to adjust to modern lifestyle factors such as shiftwork – and probably jet lag, too.
