I WAS STANDING IN FRONT OF MY OFFICE ONE DAY WHEN A COLLEAGUE FROM ANOTHER DEPARTMENT AMBLED.UP. HE''S SQUAT AND STRONG AND LOOKS NOT SO MUCH LIKE A PROFESSOR AS A WOODCHOPPER, WITH THICK FOREARMS LIKE A PAIR OF ROLLING PINS, AND HAIRY HANDS THAT ARE USUALLY HALF-CLENCHED. HE.EXUDES AN ENVIABLE VITALITY; YOU HAVE A FEELING THAT HE MIGHT LIVE 120 YEARS."HOW ARE YOU?" I ASKED. AND HE TOLD ME-FOR 10 MINUTES RUNNING.HE INFORMDD ME IN DETAIL ABOUT HIS.CHILDREN''S DOINGS, HIS SUMMER VACATION, HIS EVE