Before revision: The prior research efforts to refute Gray's paradox only looked at the drag reducing aspect of dolphin's skin, but never questioned the basic assumption of Gray "that drag cannot be greater than muscle work" which led to paradox in the first place.
After revision: Gray's wrong assumptionThe prior research efforts to refute Gray's paradox only looked at the drag reducing aspect of dolphin's skin, but never questioned the basic assumption of Gray "that drag cannot be greater than muscle work" which led to paradox in the first place.