Today scientists believe that life originated from the sea. Marine turtles climb from the waves to live on dry ground and then return to the ocean again, and they have special features for both the land and sea. Therefore, many view them as a vestige of an earlier stage in the evolutionary process.
今天科學家已知生命起源自海洋，海龜則由海洋上到陸地生活，最後又回到海裡，身上兼具有陸地與海裡的特性，被視為生物進化過程遺留的產物。