The eocene ' s oceans , according to fossil records of oxygen , were the warmest of the past 60 million years . they were also much higher than today ' s seas 化石中的氧表明,始新世的海洋是过去6000万年间最温暖的。海平面也现在高很多。
But the scrappy fossil record of early primates ? mostly teeth and isolated skeletal bones ? left researchers hard put to test these hypotheses 但是,早期灵长类的化石记录(以牙齿和零散的骨骼居多)实在太少了,让研究人员难以验证这些假说。
Indeed , they often act as a linguistic fossil record , preserving objects and behaviour that have long since fallen into petrified obsolescence 事实上,它们常常充当的是语言上的化石记录,保存着那些很早前就已经变成僵化的过时货的对象与行为。
And considering the extremely imperfect nature of the fossil record , chances are that this figure significantly underrepresents the number of apes that actually existed at that time 由于化石记录必然是断烂朝报,这个数字很可能根本不能反映实情。
Scientists have long believed that bees first appeared about 120 million years ago - - but previous bee fossil records dated back only about 65 million years 科学家们已经相信蜜蜂最早出现于1亿2千万年已经很久了,但是以前发现的蜜蜂化石记录只是在6500万年前。
While many creationists hold this view for some smaller aspects of creation , for example the existence of the fossil record , the argument has been largely superceded 虽然许多创造学家为一些造物的更小形象持有这个看法,例如存在的化石记录,很大程度上取代了辩论。
Both of these facts mean it is likely that some lineages which seem to make their first appearance in the extratropical fossil record actually started out near the equator 上述两种因素都表明某些世系虽最早出现在热带外区域的化石记录上,实际上却有可能起源于赤道附近。
In the past 15 years new opportunities to study the region ' s rock and fossil records have finally enabled investigators to piece together a more complete picture of amazonian history 过去15年来,由于有新的机会研究该地区岩石及化石记录,终于使研究人员得以拼凑出更完整的亚马逊河历史全貌。
The caves of the sierra de atapuerca contain a rich fossil record of the earliest human beings in europe , from nearly one million years ago and extending up to the common era 阿塔皮尔卡山洞穴中发现了大量早期人类化石,经考证是欧洲最早的人类化石,可以追溯到100万年以前至公元纪年这段时期。
Based on this knowledge it is easy to see that this three to five year period is well below the usual level of resolution and the fossil record should show a distinct break for all species 基于这一认识, 3 5年的时间在地质记录中是极短的,所以化石的记录应当显示的是一个所有物种的明显中断。