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美国公司声称复活灭绝物种恐狼

2025-04-08 22:22 by 太空战

美国公司 Colossal Biosciences 宣布复活了一种灭绝的物种——恐狼。Colossal 公司声称,3 只基因编辑灰狼幼崽——10 月出生的两只公狼 Remus 和 Romulus,1 月出生的一只母狼 Khaleesi,后者实际上是恐狼。恐狼是一种已灭绝的大型犬科动物,曾生活在美洲地区,直到大约 1 万年前灭绝。这些动物看起来像披着白大褂的大型狼。它们因电视剧《权力的游戏》而广为人知,Khaleesi(卡丽熙)就以剧中主角的名字命名。灰狼和恐狼由于外观的相似性被认为是近亲,但 2021 年一项古 DNA 研究显示,它们最后一个共同祖先生活在大约 600 万年前。胡豺、非洲野犬、红豺与灰狼的关系都比二者更密切。Colossal 公司声称,仅仅通过 20 个基因编辑就把灰狼变成了恐狼。Shapiro 表示,事实上这 20 个基因编辑中,5 个是基于已知的能让灰狼产生浅色皮毛的突变;15 个直接基于恐狼基因组,旨在改变它的体形、肌肉组织和耳朵形状。“弄清楚它们是否对基因编辑动物产生了预期效果,还需要一年左右。”

中国科学报:3只幼崽出生,恐狼“复活”了?

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美国公司声称复活灭绝物种恐狼

2025-04-08 22:22 by 太空战

美国公司 Colossal Biosciences 宣布复活了一种灭绝的物种——恐狼。Colossal 公司声称,3 只基因编辑灰狼幼崽——10 月出生的两只公狼 Remus 和 Romulus,1 月出生的一只母狼 Khaleesi,后者实际上是恐狼。恐狼是一种已灭绝的大型犬科动物,曾生活在美洲地区,直到大约 1 万年前灭绝。这些动物看起来像披着白大褂的大型狼。它们因电视剧《权力的游戏》而广为人知,Khaleesi(卡丽熙)就以剧中主角的名字命名。灰狼和恐狼由于外观的相似性被认为是近亲,但 2021 年一项古 DNA 研究显示,它们最后一个共同祖先生活在大约 600 万年前。胡豺、非洲野犬、红豺与灰狼的关系都比二者更密切。Colossal 公司声称,仅仅通过 20 个基因编辑就把灰狼变成了恐狼。Shapiro 表示,事实上这 20 个基因编辑中,5 个是基于已知的能让灰狼产生浅色皮毛的突变;15 个直接基于恐狼基因组,旨在改变它的体形、肌肉组织和耳朵形状。“弄清楚它们是否对基因编辑动物产生了预期效果,还需要一年左右。”

中国科学报:3只幼崽出生,恐狼“复活”了?

#科学

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The global forecast for the Asian markets is murky following recent volatility, with crude oil prices providing support in what has been an otherwise tough month. The European markets were down and the U.S. bourses were mixed and flat and the Asian markets figure to split the difference.The TSE finished modestly lower on Friday following losses from the financial shares and property stocks.For the day, the index sank 15.09 points or 0.49 percent to finish at 3,061.35 after trading between 3,057.84 and 3,089.78. Volume was 1.39 billion shares worth 1.30 billion Singapore dollars. There were 285 decliners and 184 gainers.

However, analysts are positive on the stock now. “We have seen a huge downside movement in the stock due to the central electricity regulatory commission’s (CERC) order that seems to be negative from 2014-15 onwards but we cannot take a linear negative view on the stock and further downside movement on the stock is unlikely. Currently stock is underpriced. Investors can bet on it for a longer horizon," said Vivek Gupta, director research at CapitalVia Global Research.

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