一 | Researchers from the University of California's San Diego School of Medicine have found that gonorrhea, as unpleasant as it is, might be the reason that our grandparents even exist.,Humans are among the few species that continue to live after menopause, which might be because of the evolution-proven support that older women provide when it comes to raising children.,The new findings suggest that pressure from pathogens like gonorrhea developed human gene mutations that protected elderly people from cognitive decline and made sure they could live longer.,The discovery comes by comparing human and chimpanzee genomes. The comparison revealed that humans have their own unique version of the gene for CD33, a receptor in immune cells that plays an important role in binding to a type of sugar called sialic acid. Human cells are coated with it and it helps immune cells "recognize" other cells and not attack them.,"Somewhere along the evolutionary line, humans picked up an additional mutated form of CD33 that is missing the sugar-binding site," the authors said. "The mutated receptor no longer reacts to sialic acids on damaged cells and plaques, allowing the microglia to break them down. Indeed, higher levels of this CD33 variant were independently found to be protective against late-onset Alzheimer's.",It would seem that CD33 was selected by evolution for its survival advantages, later making sure that humans were able to have big families that represent several generations. All of this, albeit indirectly, thanks to gonorrhea.。 8月26日消息，据Carscoops报道，一辆搭载自动驾驶设备的奔驰AMG GT 63测试车近日现身纽博格林北环，完成了两圈放手式自动驾驶跑圈，但两圈成绩都远不及小米YU7 GT创下的自动驾驶圈速纪录。 谍照中的GT 63采用哑光橘涂装，车顶加装了三组传感器，驾驶座上的车手戴着头盔，双手全程悬在方向盘附近没有握住它，方向盘后方还能看到监控摄像头，车手的角色只是紧急情况下的安全兜底。
测试过程也很谨慎，AMG先让测试车贴着赛道最右侧缓慢行驶，对路面边缘进行测绘，随后换到最左侧重复一遍，单边测绘各花了约25分钟，目的是收集足够精确的位置信息。 测绘完成后车辆以刻意保守的节奏开始自动驾驶跑圈，刹车点明显早于正常跑圈所需，出弯加速也收着来。
二 | 第一圈自动驾驶耗时不到20分钟，回站后工程师分析数据并调整软件，第二圈快了几分钟，但据报道与纪录差距仍然巨大。
而纽北的自动驾驶圈速纪录来自小米汽车，今年6月22日，小米YU7 GT以10分29秒483的成绩创下全球首个纽北自动驾驶官方认证圈速，比专业车手驾驶同款车型刷出的7分22秒755纽北最速SUV纪录慢了约3分7秒。
刷圈全程采取保守走线策略，直道最高时速还被限制在210km/h，而AMG这次的两圈成绩与之相比都不是一个量级。 据了解，奔驰此前就已用过高性能车验证自动驾驶，2022年3月AMG就用GT 63 S四门版做过无人驾驶测试，当时车速被限制在170km/h，核心目的是验证高精地图、稳定性算法和线控系统。 不过，把这套思路搬到20.8公里、70多个弯道的纽北北环，难度完全是另一个层级。 梅赛德斯在第二圈测试后结束了当天的测试，不出意外的话，车队消化完数据还会回到纽北，向小米的纪录发起正式冲击。
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Published on:03:56:56
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