How long can you survive in the Arctic?

The Arctic differs from Antarctica in one important way: people have lived there continuously for thousands of years, so the question is really about equipment and knowledge rather than possibility. Winter interior temperatures reach -40 °C and below, at which exposed skin freezes in minutes and wet clothing becomes lethal rather than uncomfortable. The specific Arctic hazards are sea ice that can break up, whiteouts that remove any sense of direction, and a winter in which the sun does not rise for weeks. Food is available — marine mammals, fish and caribou — but a diet of very lean meat alone causes protein poisoning, which is why traditional Arctic diets are built around fat. The practical answer, then, is that the Arctic is survivable indefinitely with the right clothing and knowledge, and dangerous within the hour without them.

What changes the figure

• Staying dry matters more than any single item of clothing
• Layering that can be vented prevents sweat, which is the usual route to hypothermia
• Fat, not lean protein, is what makes a hunted Arctic diet work

Physiology, not instruction. Every figure here is a population range under particular conditions, and individual variation is large — temperature, exertion, fitness and health move all of them substantially. Nothing on this page is medical advice.

Places

• How long could you survive in deep space? About fifteen seconds of consciousness, and roughly ninety seconds before the damage becomes irreversible.
• Could you survive on Mars? Unprotected, under two minutes. In a pressurised habitat, indefinitely — the limits become supply and radiation.
• How long can you survive in the death zone on Everest? Hours to a couple of days. Above about 8,000 metres the body deteriorates no matter what you do.
• How long can you survive adrift in the open ocean? In warm water with a raft, three to five days without drinking water — but immersion in cold water is measured in hours.
• How long could you survive on the Moon? About fifteen seconds of consciousness without a suit. With one, the record stay is 75 hours.
• How long could you survive in the Mariana Trench? Unprotected, no measurable time at all — the pressure is over a thousand times atmospheric. In a submersible, as long as the life support lasts.
• How long can you survive in Antarctica? Minutes to an hour unprotected in a winter storm — or indefinitely, since around a thousand people overwinter there every year.
• How long can you survive in the Sahara Desert? Around a day without water in summer daytime heat, and several days if you can stay in shade and move only at night.
• How long could you survive on Venus? Seconds. The surface is 465 °C at ninety-two times Earth's atmospheric pressure — the hardest place in the solar system to land on.
• Could you survive on Jupiter? There is no surface to survive on — you would fall inward until pressure and heat ended it, within minutes.
• How close to the Sun could you survive? Nothing solid survives contact — but a shielded spacecraft has flown within about 6 million kilometres of the surface.
• How long could you survive on a desert island? Fresh water decides it. With a spring or reliable rain, years; without, about three days.
• How long can you survive on the International Space Station? Indefinitely while it is resupplied — it has been continuously crewed since November 2000.
• How long can you survive in a cave? With water and warmth, months — people have done it deliberately. Without light or a way out, hypothermia is the clock.