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那些“死去”的小星系是如何恢复到原来的状态并重新形成恒星的呢

  Gas falling into the dwarf galaxy must fight the galaxy’s old stars before making new ones

  落入矮星系的气体必须先与旧恒星斗争,然后才能形成新的恒星

是穿山甲传播了新冠病毒吗

  Pangolins are scaly creatures often used in traditional Chinese medicine.Credit:Frans Lanting/National Geographic

  穿山甲是传统中医常用的鳞片动物。图片

科学家改造出发光植物

  Plants that"glow-in-the-dark"have been developed by researchers using DNA taken from mushrooms.

  研究人员利用从蘑菇中提取的脱氧核糖核酸(DNA)研发出了发光

格陵兰岛以及南极洲冰川的融化使海平面上升了1.4厘米

  La Península Antártica es una de las zonas que más hielo estáperdiendo.NASA

  南极半岛是目前冰雪消融速度最快的区域之一。

 

新发现的超导电流只沿材料的边缘流动

  lectricity flows without resistance on the rim of molybdenum ditelluride

  电流在二碲化钼的边缘无阻力流动

  The material molybdenum ditelluride can ho

饥饿的蚱蜢?不断上升的二氧化碳水平会如何引发一场昆虫灾难

  At a Kansas site where plants now have less nutrients,this two-striped grasshopper is in decline

  在堪萨斯州的一个地方,由于植物的营养成分越来越少,这种双带

有什么人在地球之外吗?

  IN 1990,A year into the journey to Jupiter of an American spacecraft called Galileo,Carl Sagan,a well-known astronomer,turned the probe’s instruments

外星球上的奇怪天气

  We often complain about the weather,particularly as more extreme weather events become more commonplace here on Earth,but what if we spent our holiday weeke

深海采矿可能破坏水下生态系统数十年

  Microbes disturbed by a seafloor experiment 26 years ago still haven’t recovered

  26年前受到海底实验干扰的微生物仍未恢复

  Sediment samples,col

行星

  Alongside the most accurate and detailed imagery ever produced The Planets will use the latest planetary science research to piece together the gripping his

科学家做出了在强度密度比上优于钻石的物质

  Scientists have found a new way to structure carbon at the nanoscale,making a material that's superior to diamond on the strength-to-density ratio.

 

美国国防部发布的UFO视频是否重要?

  On Monday,the US Department of Defense officially released three videos depicting encounters between Navy pilots and unidentified aerial phenomena.These eve

科学家们像“拨动”吉他弦一样拨动分子的化学键

  The jiggling tip of an atomic force microscope served as the‘pick’

  原子力显微镜抖动的尖端起着“镐”的作用

  原子力显微镜显示了

这是迄今为止最全面的月球地质图

  Cartographers merged Apollo-era maps and modern lunar observations to make the new graphic

  制图者将阿波罗时代的地图和现代的月球观测结果融合在一起,形成了

已发现的奇怪星际天体可能是一颗死星的碎片

  'Oumuamua,the first object known to have come from beyond the solar system,might have gotten its oblong shape when a planet was shredded by a faraway st

如果能亲手摸到月球,那会是种什么感觉?

  Twelve people have walked on the moon since humans landed there 50 years ago,but no one has ever directly touched its surface.

  自人类50年前登陆月球以来

我们生活在一个不对称的宇宙中吗

  If your life sometimes seems directionless,you might legitimately blame the universe.

  如果你有时感觉生活失去方向,那么你或许可以认为这是宇宙的错。

  A

奇怪的化学成分让我们洞察了星际彗星鲍里索夫的起源

  2I/Borisov was discovered in August 2019 through the use of a large telescope in Chile's Atacama Desert by an astronomer of the same name.The unique che

哈佛天体物理学家说,新的Oumuamua研究所并不排除它的外星性质

  Last week,a new paper in Nature Astronomy on the origins of Oumuamua–the enigmatic cigar-shaped object that shot through our solar system in 2017,sugg

疯狂吸收物质的超大质量黑洞被探测到产生从未见过的“强风”

  A team of astronomers had returned to observe an earlier discovered quasar after developing new methodology and resorting to a telescope sitting atop dorman