“You’re doing fine, Dad! You can make it.†With that, my youngest son Ben, less than half my age, entreated me as I climbed and descended a mountain — all part of his and his wife Heather’s gift on my birthday. I didn’t need a pep talk; I needed some horse liniment.
The invitation was for my wife Bonnie and me to join Ben and Heather for a weekend at Carlsbad Caverns. We were to explore the famous Big Room by going through the Natural Entrance. I’d visited the caverns before, when I was about Ben’s age and much more physically fit than I am today.
The first physics lesson a visitor learns is that even though going 75 stories downhill does not require all the heavy lifting of going up, the body nevertheless uses muscles — different muscles — to provide resistance against falling and tumbling down. With every step I took in the descent, I became aware of how I’d be sore — but differently sore — the next morning. At least the path was even. Continue reading