“One out of every three people over 80 will fall this year,” my friend Russ wrote to me. Russ is the classmate who went rafting on the Amazon three years ago and the one who bungee-jumped off a bridge in Australia to celebrate his 80th birthday. I doubt if he worries much about falling but he did wonder why, as we grow older, we get shorter and our feet get bigger. I’m not sure I know the answer to that but I suspect it is Mother Nature looking out for us. After all, if we are shorter, we haven’t so far to fall, and with bigger feet, we have a broader base to help keep our balance.