Life on Earth began in the water. When animals moved onto the ground, they switched fins for limbs.
원문출처 : https://www.cnn.com/2021/02/04/americas/zebrafish-fins-limbs-scn/index.html
원문출처 : https://www.cnn.com/2021/02/04/americas/zebrafish-fins-limbs-scn/index.html