From a book I’m reading on culture and language in modern times:

“The wish to live as intensely as possible has subjected humans to the same dilemma as the waterflea, which lives 108 days at 8 degrees Centigrade, but only 26 days at 28 degrees, whit its heartbeat is almost four times faster, though in either case its heart beats 15 million times in all.  Technology has been a rapid heartbeat, compressing housework, travel, entertainment, squeezing more and more into the allotted span.  Nobody expected that it would create the feeling that life moves too fast.”

—Theodore Zeldin