北京扁平疣医院那个好 https://m-mip.39.net/czk/mipso_8813030.htmlPalaeontology
古生物学
Very,verylonginthetooth
牙齿很长很长
Million-year-oldmammothgenomespushthelimitsofarevolutionarytechnique
百万年前的猛犸象基因组突破了一项革命性技术的极限
Inthescience-fictionmovie"OneMillionYearsB.C.",RaquelWelchandJohnRichardsontraverseaprimitivelandscapeinhabitedbydinosaursandearlyhumans.Thefilmwaslowonscienceandhighonfiction:bythendinosaurswerelongdeadandhumans—atleast,onesresemblingMsWelchandMrRichardson—werehundredsofmillenniaaway.
在年的科幻电影《公元前一百万年》中,拉克尔·韦尔奇和约翰·理查森穿越了恐龙和早期人类居住的原始景观。这部电影的科学含量低,但科幻含量高:那时恐龙早已灭绝,而人类——至少像韦尔奇和理查森这样的人——数十万年后才能出现。
AmoreaccuratepictureofEarthsinhabitantsatthetimeisnowbeingrevealed.InresearchpublishedinNature,ateamofscientistsledbyAndersGotherstrom,attheUniversityofStockholm,andLoveDalenattheCentreforPalaeogenetics,alsoinSweden,describesequencingDNAsamplesfrommammothsthatlivedanddiedinnorth-easternSiberiaaroundamillionyearsago.
一幅更精准的地球居民图正徐徐展开。在《自然》杂志上发表的一项研究中,斯德哥尔摩大学的安德斯·哥斯特伦和同样在瑞典的古遗传学中心的洛夫·戴伦领导的一个科学家团队描述了大约万年前在西伯利亚东北部生活和灭绝的猛犸象的测序DNA样本。
Theteamsworkrepresentsanewrecord,fortheirmammothDNAis,bysomehalfamillionyears,theoldesteversuccessfullyreconstituted.Extractedfromhorses,bearsandevenNeanderthalsandDenisovans,twoclosecousinsofmodernhumans,suchancientDNAhasprovedaninvaluabletoolforinvestigatingthepast.Althoughfossilspreservethegrossphysicalfeaturesofextinctanimals,theyaresilentaboutmanycrucialdetailsthatevenanin
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