地球上最古老的10種生物(下)
ko Biloba
6.銀杏Age: 270 million years old
年齡：2.7億歲
The Ginkgo tree is the only living representative of the order Ginkgoales, a group of gymnosperms dating back to 270 million years ago in the Permian period. Due to geological cataclysms, only three or four species were left in the Tertiary period (65 million years ago). The extinction of the dinosaurs as potential seed dispersers of the tree's large seeds may also have influenced this decline, which is in line with the fossil records.
銀杏是銀杏目植物的唯一成員，屬裸子植物門，最早能追溯到2億7千萬年前的二疊紀。由於地質災害頻發，只有三四個物種在第三紀（6500萬年前）倖存下來。恐龍的滅絕作爲銀杏樹種子傳播的潛在媒介，有可能對這類植物的衰落產生了影響，這種推測與化石記錄一致。
ilus
7.鸚鵡螺Age: 235 million years old
年齡：2.35億歲
Often called "living fossils," the nautilus originated in the Late Triassic period, and is a marine mollusk. The name means "sailor" in Greek. The nautilus is only found in the Indo-Pacific Ocean. They live in the deep slopes of coral reefs.
有“活化石”之稱的鸚鵡螺起源於三疊紀末期，是一種海洋軟體動物，在希臘語中意爲“水手”。鸚鵡螺僅分佈在印度太平洋區域，棲息於珊瑚礁的深坡中。eshoe Shrimp
8.三眼恐龍蝦Age: 200 million years old
年齡：2億歲
This little guy has the distinction of being the oldest living species on earth that has existed UNCHANGED for 200 million years. In other words, he may not have been around as long as some of the creatures above him, but today he's is still virtually indistinguishable from his 200 million year old fossil.
這個小傢伙被列爲地球上最古老的現存物種，生存了2億年仍一成不變。也就是說，三眼恐龍蝦存在的時間可能沒有名單中前幾名那麼長，但和它2億年前的化石比起來，如今它的模樣幾乎沒什麼變化。geon
9.鱘魚Age: 200 million years old
年齡：2億歲
Sturgeon and related paddlefish have undergone remarkably little morphological change, indicating that their evolution has been slow and earning them informal status of "living fossils." This is explained, in part, by their long inter-generation time, tolerance for wide ranges of water temperature and salinity, lack of predators due to size, and the abundance of prey items in their benthic environment.
鱘魚和近親白鱘魚在形態上發生了非常細微的變化，這說明它們進化緩慢，且“活化石”的殊榮它們當之無愧。這也在一定程度上表明，鱘魚通過漫長的進化，對水的溫度和鹽度的耐受範圍很廣。受體型大小的影響，加上底棲生物環境中食物充足，以至於它們幾乎沒有天敵。ialis Heureka
10.火星螞蟻Age: 100 million years old
年齡：1億歲
The most primitive species of living ants, the DNA of the Martialis heureka (which roughly translates to "From Mars! Wow!") has barely changed in the last 100 million years. This species was discovered in the Amazon in 2000, and generally lives its life underground.
火星螞蟻（原名大致意爲“哇！從火星來的！”）是螞蟻中最原始的物種，它的DNA在過去的1.2億年中幾乎沒有變化。公元2000年在亞馬遜雨林發現了這種螞蟻，它們通常棲息在地下。
