Governors of cities in the quake zone urged residents to sleep outside.

CNN: Aftershock raises fears as Turkey quake toll reaches 7,000

Sleep outside the park at either Sossusvlei Lodge or the self-catering Desert Camp, and rise early to catch the vivid orange dunefields at sunrise the next morning.

BBC: A do-it-yourself Namibian safari

Pepe told CNN pools of standing water are forming around water points outside schools, increasing the risk of malaria, especially for people who lost mosquito nets during the flooding and those who are now forced to sleep outside.

CNN: Disease fears in West Africa after heavy flooding

They'll eat, sleep and work onboard, outside the reach of U.S. labor laws.

FORBES

Type in your itinerary and the site will give you an hour-by-hour breakdown of when to sleep and when to go outside and seek sunlight.

BBC: Online calculators combat jet lag

Today, top software companies often sponsor 'hackathons, ' weekends of intense work and little sleep, to get free outside programming help to solve problems or advance products.

WSJ: LA Times hack: Security breach or harmless prank?

Ducking inside the cramped cube, which offers a reasonable facsimile of the claustrophobia of insomnia, you're asked to contribute answers, in the form of text and drawings, to sleep-deprivation questions that are simultaneously projected onto the outside of the cube for all to see.

WSJ: Storytelling's 'Now'

Outside my window, a chorus of coki frogs serenaded me to sleep.

NPR: Grief, and Warmth, Among Soldiers' Families in Puerto Rico

Andrew Lambourne, from the campaign group No More Night Flights, which demonstrated outside Luton town hall, said without controls in place "we will effectively only get five hours sleep".

BBC: Protesters outside Luton Town Hall