How big is a blue whale heart?
The heart in the picture above is obviously a replica, but a real blue whale heart weighs roughly 1,300 pounds; its heartbeat can be detected from two miles away and a human can fit in its arteries.
By Robert Quigley, and as found on The Mary Sue
Blue whale heart size is massive! Interested in seeing them in San Diego? Book a whale watching cruise with Hornblower.