Salt: The Wealth of the Earth

I remember getting seriously dehydrated a few summers ago. I was out playing soccer in the late afternoon on one of the hottest days of the year. I was drinking loads of water, but I felt like I was going to pass out. The water was not helping. I had to stop. I drank some Gatorade that someone handed me and waited for the feeling to subside. A short while later it had passed, and I was out playing again. In the heat and sweat of the evening, I had been lacking the electrolytes necessary to...