This video has been winding its way through the interwebs. It's pretty neat, but is it truly a case of tortoise altruism? Who knows. We don't know anything about those specific turtles or that specific situation. We don't know if they're kin, we don't know if they're trained, if they're pets or wild, we don't know what happened before the camera was turned on, or after it was turned off.

Even still, it's pretty cool.