>>1595883>>1595840>Survival Rule of Threes,>You can go 3 minutes without air.>You can go 3 hours without shelter.>You can go 3 days without water.>You can go 3 weeks without food.>You can go 3 months without supplies.>You can go 3 years without other people.There's also, "You can go 30 minutes in cold water or 3 minutes in icy water." There are special examples, varying circumstances, and different measurements, but it is essentially correct.
