一位兽医眼科医生想确定影响狗与视频内容互动兴趣的因素,包括年龄和视力。最终,这项两年前启动的研究的目标是支持开发更敏感的评估犬类视力的方法——这是兽医领域非常缺乏的东西。研究发现,狗在观看其他动物的视频时最投入。
阅读全文通过在培养皿中培养人类视网膜,研究人员发现了维生素A的一个分支如何产生特殊细胞,使人们能够看到数百万种颜色,这是狗、猫和其他哺乳动物所不具备的能力。这些发现加深了人们对色盲、与年龄相关的视力丧失以及其他与感光细胞有关的疾病的了解。他们还展示了基因如何指导人类视网膜制造特定的颜色感知细胞,科学家认为这一过程是由甲状腺激素控制的。
阅读全文研究人员已经设计出世界上首批能够利用光能的酵母细胞之一,这扩大了我们对这一特性进化的理解,并为生物燃料生产和细胞衰老的进步铺平了道路。
阅读全文研究人员将一只1.4万年前的长毛猛犸象的旅行与阿拉斯加已知最古老的人类定居点联系起来,为这一标志性物种与一些最早穿越白令大陆桥的人之间的关系提供了线索。同位素数据,以及该遗址其他猛犸象的DNA和考古证据表明,早期阿拉斯加人的定居点可能与猛犸象聚集的区域重叠。新一期《科学进展》杂志重点报道了这些发现,证明猛犸象和早期狩猎采集者在该地区共享栖息地。长毛猛犸象的长期可预测存在会吸引人类到该地区。
阅读全文Scattering sunlight-reflecting particles in the atmosphere could slow rapid melting in West Antarctica and reduce the risk of catastrophic sea-level rise, according to a study led by Indiana University researchers.
阅读全文A team led by scientists at Rensselaer Polytechnic Institute has 3D-printed hair follicles in human skin tissue cultured in the lab. This marks the first time researchers have used the technology to generate hair follicles, which play an important role in
阅读全文A new study has cast doubt on claims that Homo naledi, a small-brained hominin dating to between 335-241,000 years ago, deliberately buried their dead and produced rock art in Rising Star Cave, South Africa.
阅读全文A team of researchers from Nanyang Technological University, Singapore (NTU Singapore) has developed a computer program that creates realistic videos that reflect the facial expressions and head movements of the person speaking, only requiring an audio cl
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