How to Grow an Extra Eye

They may not produce eyes that have the color you prefer, but researchers have found a method of generating eyes starting with stem cells. At least eye tissues (like retina) could replace damaged parts in cataract, glaucoma, macular degeneration and other ocular conditions that impair vision,... [ read more >> ]

When scientists injected a specific enzyme into frog embryos, the tadpoles grew an extra eye (right image). The left image: normal tadpole eye development.

Image comment: When scientists injected a specific enzyme into frog embryos, the tadpoles grew an extra eye (right image). The left image: normal tadpole eye development.
Image credits: Masse, K., Bhamra, S., Eason, R., Dale, N. and Jones, E./Nature

When scientists injected a specific enzyme into frog embryos, the tadpoles grew an extra eye (right image). The left image: normal tadpole eye development.
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