NYT的文章说,最新突破性的理论证实,长颈鹿之所以进化出长脖子,不仅仅是为了获得食物,还为了方便进行打架,head-butting battle
BBC拍的《非洲》系列纪录片,有一集末尾就拍到了两只雄鹿为了争夺配偶权,进行决斗,方式就是甩动长长的脖子,用脑袋和犄角攻击对方臀部。我第一次知道长颈鹿是那样打架的,场面比我想象的要凶狠许多。
Since the days of Charles Darwin, the long necks of giraffes have been a textbook example of evolution. The theory goes that as giraffe ancestors competed for food, those with longer necks were able to reach higher leaves, getting a leg — or neck — up over shorter animals.
But a bizarre prehistoric giraffe relative reveals that fighting may have driven early neck evolution in addition to foraging. In a study published Thursday in Science, a team of paleontologists described Discokeryx xiezhi, a giraffe ancestor, as having helmet-like headgear and bulky neck vertebrae. Discokeryx was adapted to absorb and deliver skull-cracking collisions to woo mates and vanquish rivals.
BBC拍的《非洲》系列纪录片,有一集末尾就拍到了两只雄鹿为了争夺配偶权,进行决斗,方式就是甩动长长的脖子,用脑袋和犄角攻击对方臀部。我第一次知道长颈鹿是那样打架的,场面比我想象的要凶狠许多。
Since the days of Charles Darwin, the long necks of giraffes have been a textbook example of evolution. The theory goes that as giraffe ancestors competed for food, those with longer necks were able to reach higher leaves, getting a leg — or neck — up over shorter animals.
But a bizarre prehistoric giraffe relative reveals that fighting may have driven early neck evolution in addition to foraging. In a study published Thursday in Science, a team of paleontologists described Discokeryx xiezhi, a giraffe ancestor, as having helmet-like headgear and bulky neck vertebrae. Discokeryx was adapted to absorb and deliver skull-cracking collisions to woo mates and vanquish rivals.
【德国南部发生火车脱轨事故 造成至少4人死亡多人重伤】据BBC报道,当地时间3号,这列火车从位于#德国# 南部的巴伐利亚州加米施-帕滕基兴开往慕尼黑的火车在途中出轨,该事故至少造成了4人死亡、30人受伤。当地警方称,这列火车的几节车厢出轨翻覆,事发时火车上车上约有60名乘客,其中有许多学生。目前,事发路段已经停运,调查人员表示,他们正在努力确定导致事故的原因。
#台海点兵# 【西方牵头全球最大海上军演,不带台湾】(观察者网讯)美国海军近日宣布2022“环太平洋”军演将于6月29日正式举行,并特别强调,在总计26国的参与国中,将包括“四方安全对话”(QUAD)全部成员国以及五个南海周边国家。同时,英国广播公司(BBC)和多家台媒注意到,参与国名单中并不包括台湾地区。
此前,美国国会通过的《2022年国防授权法案》中建议邀请台湾地区参与,台当局也宣称“正积极争取”。对此,国台办发言人马晓光曾警告美方:“这是在台湾问题上玩火,玩火者必自焚。”
此前,美国国会通过的《2022年国防授权法案》中建议邀请台湾地区参与,台当局也宣称“正积极争取”。对此,国台办发言人马晓光曾警告美方:“这是在台湾问题上玩火,玩火者必自焚。”
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