Shelter
A barrier between the body and the weather — dry, windproof, and off the cold ground — because exposure kills a human faster than thirst or hunger.
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✦ Attendez, vraiment ?
Exposure can kill faster than almost anything else in the wild: a wet, windy day only a little above freezing can bring on life-threatening hypothermia within a few hours — quicker than thirst takes days or hunger takes weeks.
Ce que c'est
Any built or found structure that puts a barrier between a human body and the weather — wind, rain, cold, and heat. At minimum it keeps you dry, blocks the wind, and lifts you off cold ground. Shelter is the body's first line of defense against the environment, older than agriculture, pottery, or the wheel.
Pourquoi cela a compté
A human body loses heat far faster than it can make it once wet and windblown, and can die of hypothermia in hours — long before thirst (days) or hunger (weeks) turns deadly. Managing that heat loss is what let humans spread out of the tropics into deserts, mountains, and ice. Every settled society begins with the problem of staying warm and dry.
Comment cela a été fait
The oldest shelters used whatever was at hand — branches, hides, bone, snow, or the mouth of a cave — arranged to break the wind and shed rain, over a bed of dry material to insulate the sleeper from the ground. The physics was understood intuitively long before it was named: trap a layer of still air, stay dry, and keep the wind out.
Ce que cela a débloqué
Survival outside the tropics, and with it the peopling of nearly every climate on Earth. Permanent shelter makes storage, settlement, and eventually the city possible; the hearth inside it is where cooking, warmth, and family life converge.
Version minimale viable
A windbreak of branches, hides, or snow that sheds rain, with a thick bed of dry leaves or boughs to lift the sleeper off the cold ground.
Requiert
Rien — une racine du graphe.
A débloqué
Frontière — rien de cartographié encore.
Sources
- — John 'Lofty' Wiseman, *SAS Survival Handbook* (1986)
- — Witold Rybczynski, *Home: A Short History of an Idea* (1986)
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