There is a word/phrase which explains why we don't get sleep when we are in a new place. AFAIK it is/was due to the fact that our hunterer-gatherer ancestors were prey and at times when they moved they didn't know that the new place is secure or not. Does anybody know a word/phrase which describes it rather than going through the whole wordy description ?
We haven't been hunter-gatherers for a very long time, but some people do suffer from insomnia when they travel. Long hours on the road or rapid long-distance trans-meridian travel on high-speed airplanes can prevent many a traveller from getting a good night’s sleep. That's what we call "travel-induced insomnia".
- Travellers going long distances on jet planes have to readjust their sleeping hours in a new place. Presidents and Prime Ministers take injections of sleep-inducing drugs to overcome travel-induced insomnia and to readjust to new working hours when travelling abroad.