Functional eyes grown at the tails of tadpoles

physlord writes: "There’s a great deal of wow to unpack here, so let’s take it piece by piece. Using embryos from the African clawed frog (Xenopus), scientists at Tufts’ Center for Regenerative and Developmental Biology were able to transplant eye primordia—basically, the little nubs of flesh that will eventually grow into an eye—from one tadpole’s head to another’s posterior, flank, or tail.

Amazingly, a statistically significant portion of the transplanted one-eyes could not only detect LED changes, but they showed learning behavior when confronted with electric shock. [...]"