Fatigue! And now we know how to fix it! On February 13, 1972, Michel Siffre climbed into a cave in southwestern Texas. He spent the next six months,…
hours
Backpack for emergency evacuation and survival for 72 hours
It is not a fantasy at all. The nature of human activity are affected. Natural disasters, such as hurricanes, storms, earthquakes, floods, volcanoes, carcasses, water, fuel and electricity….