Maybe. I bet, though, that if you made me do the work my grandfather did when he was a youngster, or that my great-grandfather did when he was my age, I'd burn

Maybe. I bet, though, that if you made me do the work my grandfather did when he was a youngster, or that my great-grandfather did when he was my age, I'd burn those 4000 calories a day, just 'cause being a fat desk worker, I'm not going to be nearly as efficient, even if I get to keep my 21st century digital healthcare and hygiene.