2015年CRI 新的化石证据表明存在一种以前未知的古老的人类

 

Scientists say they may have discovered new fossil evidence suggesting the existence of a previously¹ unknown species of ancient human.

The fossils, including part of a jaw² and teeth, have been discovered in Ethiopia.

Paleoanthropologist Yohannes Haile-Selassie says they're working under the assumption this species of human may have lived alongside the famous human ancestor "Lucy."

"What we are announcing today is a new species of early human ancestor, which is about between 3.3 and 3.5 million years old. This is a species that we found from the Afar region of Ethiopia from a place called Woranzo Mille and we have been conducting research at this site for the last four years."

The new species, Australopithecus deyiremeda, is said to have a combination of ape-like and human-like traits, as did Lucy's species, Australopithecus afarensis.

However, researchers say they believe the bone structures are sufficiently³ different to classify the new find as a separate species.

Scientists say it is possible the two species may have had different diets, meaning they didn't have to compete for the same resources.

Researchers have theorized that our species, Homo sapiens, who began appearing some 200-thousand years,

could be the natural evolution of cross-breeding among different members of our genus.

1 previously   

adv.以前，先前（地）

参考例句：

• The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
• Let me digress for a moment and explain what had happened previously.让我岔开一会儿，解释原先发生了什么。

2 jaw   

n.颚，颌，说教，流言蜚语；v.喋喋不休，教训

参考例句：

• He delivered a right hook to his opponent's jaw.他给了对方下巴一记右钩拳。
• A strong square jaw is a sign of firm character.强健的方下巴是刚毅性格的标志。

3 sufficiently   

adv.足够地，充分地

参考例句：

• It turned out he had not insured the house sufficiently.原来他没有给房屋投足保险。
• The new policy was sufficiently elastic to accommodate both views.新政策充分灵活地适用两种观点。