專題特寫
Bruce、Antony
The axolotl, a type of salamander, is a unique symbol of Mexico City. This amphibian tends to reach maturity without going through metamorphosis. Although some axolotls do eventually leave the water, most of them keep their external gills and stay underwater permanently. They are sometimes called “walking fish” because they resemble a fish with legs when they become mature.
Axolotls basically come in five colors, and they seem to have a cute, smiling expression. They have tiny arms with long, thin digits. The body length ranges from 15 to 45 centimeters but rarely greater than 30 centimeters, and they live for about 15 years. They are carnivores with a diet of worms, insects, and small fish.
Their name comes from Aztec culture. Xolotl was an ancient god that was connected to lightning, fire, and sickness. He was the twin brother of Quetzalcoatl, and like the axolotl, he possessed the ability to transform his body.
The axolotl is a fascinating creature in biology because it has the remarkable ability to regrow body parts if any of them are lost or damaged. It is also possible to transplant body parts from one axolotl to another without rejection from the recipient. Scientists hope that by studying the axolotl, we might learn to regrow tissue from the human body someday.
成年後仍青春永駐的六角恐龍。
六角恐龍(編按:學名為墨西哥鈍口螈)這種蠑螈是墨西哥城的奇特象徵。這類兩棲生物通常不會經歷變形(編按:生物透過細胞繁殖或分化,產生型態或結構變化的過程)就達達到生理成熟。雖然有些六角恐龍最終會離開水域,但大多會保留位於身體外部的腮然後永久生存於水中。因為六角恐龍成年後看起來貌似一隻有腳的魚,所以有時人們會稱牠們為「行走的魚」。
六角恐龍基本上有五種顏色,而且牠們貌似帶著可愛微笑的表情。牠們有小小的四肢和細長的指頭。牠們身長介於十五到四十五公分,超過三十公分則為少數情形,且牠們可存活大約十五年。六角恐龍屬肉食性,以幼年成年昆蟲和小型魚類為食。
六角恐龍的名字源自於阿茲提克文化(編按:十四至十六世紀墨西哥古文明)。Xolotl 為古代之神,與閃電、火焰和疾病有關。他的攣生兄弟為 Quetzalcoatl,而如同六角恐龍一樣,Xolotl 也擁有改變身體形貌的能力。
六角恐龍在生物界是一種有趣的生物,因為在喪失或損傷任何身體部位時,牠有再生的非凡能力。牠們彼此之間還能夠相互移植身體部位,且接收者不會產生排斥反應。科學家希望藉由研究六角恐龍, 或許某天我們能知道如何在人體上讓組織再生。
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