We’ve all heard the phrase. It slips out when a tomato grows to the size of a pumpkin, when a two-headed snake is born, or when a sudden storm drops hail the size of tennis balls. “That’s a real freak of nature.”
The poster child of “freaks.” Two-headed snakes, turtles, and calves occur when an embryo begins splitting into twins but stops midway. The two heads often fight over food (in snakes) or coordinate surprisingly well (in turtles). Most die young, but some—like the two-headed rat snake “Pancho and Lefty”—lived for years in captivity. freaks of.nature
When a developing embryo begins to split into conjoined twins but doesn’t complete the process, you can get extra limbs. In frogs and humans alike, this is a failure of apoptosis (programmed cell death)—the genetic “scissors” that normally trim away excess tissue didn’t snip in time. We’ve all heard the phrase
We’ve all heard the phrase. It slips out when a tomato grows to the size of a pumpkin, when a two-headed snake is born, or when a sudden storm drops hail the size of tennis balls. “That’s a real freak of nature.”
The poster child of “freaks.” Two-headed snakes, turtles, and calves occur when an embryo begins splitting into twins but stops midway. The two heads often fight over food (in snakes) or coordinate surprisingly well (in turtles). Most die young, but some—like the two-headed rat snake “Pancho and Lefty”—lived for years in captivity.
When a developing embryo begins to split into conjoined twins but doesn’t complete the process, you can get extra limbs. In frogs and humans alike, this is a failure of apoptosis (programmed cell death)—the genetic “scissors” that normally trim away excess tissue didn’t snip in time.