搜索结果: 46-60 共查到“国际动态 地质学”相关记录1008条 . 查询时间(1.64 秒)
美国“毅力”号火星车成功着陆 将探索火星生命迹象(图)
美国国家航空航天局 二氧化碳 探测器
2021/11/18
美国东部时间18日下午(北京时间19日凌晨),美国“毅力”号火星车成功登陆火星,成为美国国家航空航天局(NASA,以下简称美国航天局)第5个成功登陆的火星车。“毅力”号将在火星采集样本并试图寻找生命存在的证据。
1亿年前萤火虫就已学会发光抵御捕食者
1亿年前 萤火虫 发光 捕食者
2021/1/28
盛夏的野外,萤火虫一闪一灭的光亮,犹如一盏盏神秘莫测的明灯。通常,只有年幼和雌性萤火虫才发光,这是一种求爱信号。极少数的雄性萤火虫也用闪光进行防御。近日,中国科学院南京地质古生物研究所与捷克帕拉茨基大学、英国布里斯托大学及中山大学合作,从缅甸琥珀中发现了萤火虫的一个“老祖先”:白垩光萤科。这一新类群的发现对于研究叩甲总科中生物发光的起源与演化具有重要意义。该成果1月20日在线发表在英国《皇家学会会...
![](http://www.firstlight.cn/upload/imgfile/20211/28/202112814386190.jpg)
Rare lichen unique to Florida discovered in museum collection, may be extinct(图)
Rare lichen unique Florida discovered museum collection may be extinct
2021/1/28
Scientists have found a new species of fleshy verdigris lichen, thanks to DNA analysis of museum specimens. Misidentified by its original collectors, the lichen is only known from 32 specimens collect...
![](http://www.firstlight.cn/upload/imgfile/20211/18/202111891452146.jpg)
Reawakened geyser does not foretell Yellowstone volcanic eruptions(图)
Reawakened geyser does foretell Yellowstone volcanic eruptions
2021/1/18
When Yellowstone National Park's Steamboat Geyser -- which shoots water higher than any active geyser in the world -- reawakened in 2018 after more than three years of dormancy, some speculated that i...
![](http://www.firstlight.cn/upload/imgfile/20211/18/202111891059784.jpg)
Geoscientists develop new approach to understanding massive volcanic eruptions(图)
Geoscientists approach massive volcanic eruptions
2021/1/18
A team of geoscientists has developed a new way to reconstruct the sizes of volcanic eruptions that occurred thousands of years ago, creating a first-of-its kind tool that can aid in understanding pas...
![](http://www.firstlight.cn/upload/imgfile/20211/18/202111885627691.jpg)
Leaf fossils show severe end-Cretaceous plant extinction in Patagonia(图)
Leaf fossils severe end-Cretaceous plant extinction Patagonia
2021/1/18
The asteroid impact 66 million years ago that ushered in a mass extinction and ended the dinosaurs also killed off many of the plants they relied on for food. Fossil leaf assemblages from Patagonia su...
![](http://www.firstlight.cn/upload/imgfile/20211/8/20211891740915.jpg)
Mummified baboons reveal likely location of fabled land of Punt, far reach of early Egyptian mariners(图)
Mummified baboons likely location fabled land Punt far reach early Egyptian mariners
2021/1/8
The fabled land of ancient Punt was a major trading partner of Egypt's for at least 1,100 years. Punt was an important source of luxury goods, including incense, gold, leopard skins and living baboons...
![](http://www.firstlight.cn/upload/imgfile/202012/31/20201231135050746.jpg)
Remote Hawaiian island harbors last land snails of their kind(图)
Remote Hawaiian island harbors last land snails their kind
2020/12/31
The island of Nihoa, a slice of jagged rock that juts out of the Pacific Ocean, is the sole refuge for a rediscovered species of native Hawaiian land snail previously presumed to be extinct.First reco...
关于地球板块初始俯冲时间的最新发现—来自钛同位素的地球化学证据
地球板块 板块俯冲 钛同位素 地球化学
2020/12/28
加州大学圣地亚哥分校斯克里普斯海洋学研究所和芝加哥大学的科学家进行的一项新研究,揭示了地球科学界存在巨大分歧的问题:板块俯冲是什么时候开始的? 相关成果发表在12月9日的《科学进展》(Science Advances)期刊上。
自然科研旗下《科学报告》18日发表的一项气候变化及地质学研究表明,一直到约5900年前,也就是提洛尔冰人(即“冰人奥茨”)出生不久前,海拔3000米到4000米的阿尔卑斯山峰顶可能都是无冰的;当时,新的冰川正开始形成。研究结果显示,只有阿尔卑斯山最高峰(海拔4000米及以上)在当前地质时期的整个阶段都是被冰覆盖的——当前地质时期是指从约11650年前开始的全新世。
![](http://www.firstlight.cn/upload/imgfile/202012/18/20201218132146166.jpg)
New study helps pinpoint when Earth's plate subduction began(图)
New study pinpoint when Earth plate subductiona
2020/12/18
A U.S. National Science Foundation-funded study by scientists at the Scripps Institution of Oceanography and the University of Chicago sheds light on a major question in Earth sciences:...
化石研究发现“霸屏”小恐龙
化石研究 霸屏 小恐龙
2020/12/17
据科学杂志《白垩纪研究》日前报道,大约1.1亿年前,在当今巴西东北部的一座古老潟湖沿岸,生活着一种两足、像鸡大小的白垩纪恐龙,它以狩猎昆虫以及像青蛙和蜥蜴这样的小型脊椎动物为生。
身高不矮,脖子更长蜥脚类恐龙为何进化出纤长脖子
蜥脚类 恐龙 进化 纤长脖子
2020/12/17
蜥脚类恐龙,是侏罗纪早期地球的王者。其家族庞大,足足演化出100多个物种。同时,它们也是地球历史上体型最大的恐龙群体。在11月17日出版的英国《皇家学会生物学分会学报》上,古生物学家新近分析了阿根廷巴塔哥尼亚出土的蜥脚类恐龙头骨,以及附近岩层中的植物化石,得以了解这头蜥脚类恐龙生活时期的气候和生态系统,进而推断1.8亿年前的气候变化。其中,最引人关注的是,为何侏罗纪早期蜥脚类恐龙就已演化出纤长脖子...
国际最新研究:翼龙演化最近近亲或为小型动物兔蜥
翼龙演化 最近近亲 小型动物兔蜥
2020/12/11
国际著名学术期刊《自然》最新发表一项古生物学研究论文指出,翼龙作为第一种演化出动力飞行能力的脊椎动物,其在演化上的最近近亲可能是一种名为兔蜥(lagerpetid)的类似恐龙的小型动物。
![](http://www.firstlight.cn/upload/imgfile/202012/11/20201211104531114.jpg)
Fossils support new hypothesis for origin of hoofed mammals(图)
Fossils support new hypothesis origin hoofed mammals
2020/12/11
New research published in the Journal of Vertebrate Paleontology describes a fossil family that illuminates the origin of perissodactyls -- the group of mammals that includes horses, rhinos ...