Time Lords Have Two Hearts, but Could Humans? YouTube Show Head Squeeze Explains
We'd just use our extra heart to love David Tennant even more.
The Doctor, like all Time Lords, has a binary vascular system — two hearts. Besides that fact, the super-long lives, and the whole regeneration thing, they’re very similar to humans. So could humans have two hearts as well? As part of their “Doctor Who Week” Head Squeeze tackled the question to tell us that sometimes, yes. Humans can.
(via Head Squeeze)