By cloning cells and modifying genes, scientists in Korea have developed cats that glow bright red in the dark. The cloned Turkish Angola on the left has a fluorescent protein in its skin cells. The protein gives off a red glow when exposed to ultraviolet light. The ordinary Turkish Angola on the right lacks the red fluorescent protein, so it appears green under ultraviolet light.
Science as a Way of Knowing
Q: How and why do scientists manipulate DNA in living cells?