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Hace 3 horas · AD An extreme oxygen-rich red hypergiant that has experienced two dimming periods in the 20th century where the star became dimmer by up to 2.5 magnitudes. Potentially the largest known star in the Milky Way. AH Scorpii: 1,411 ± 124: AD RSGC1-F06 1,382 +298 −384: L/T eff: S Persei: 1,364 ± 6: AD CD-33 12241: 1,359: L/T eff: NML Cygni ...
Hace 1 día · The Crusades of 1239–1241. The Crusades of 1239–1241, also known as the Barons' Crusade, were a series of crusades to the Holy Land that, in territorial terms, were the most successful since the First Crusade. [151] The major expeditions were led separately by Theobald I of Navarre and Richard of Cornwall. [152]
Hace 3 horas · After the monarchy was dissolved, Iraq established the Iraqi Republic in 1958 (Wikipedia, 2022). Iraq has fought in 22 conflicts since the start of World War One (1914), four of which were regional wars: the first was the Iran-Iraq War (1980–1988), the second was the Gulf War (January 17, 1991), and the third was the US-led invasion and occupation of Iraq on March 21, 2003.
Hace 1 día · Human cloning is the creation of a genetically identical copy of a particular human. The term is generally used to refer to artificial human cloning, which is the reproduction of human cells and tissue. It does not refer to the natural conception and delivery of identical twins. The possibilities of human cloning have raised controversies.
Hace 1 día · DNA çift sarmalının yapısı. Deoksiriboz nükleik asit veya kısaca DNA, tüm organizmaların ve bazı virüslerin canlılık işlevleri ve biyolojik gelişmeleri için gerekli olan genetik talimatları taşıyan bir nükleik asittir. DNA'nın başlıca rolü bilgiyi uzun süre saklamasıdır.
Hace 1 día · v. t. e. The 2022 United States House of Representatives elections in Tennessee were held on November 8, 2022, to elect the nine U.S. representatives from the state of Tennessee, one from each of the state's nine congressional districts. The elections coincided with other elections to the House of Representatives, elections to the United States ...
Hace 1 día · 图尔河（Thur river） 摄影：Tangopaso（来源：WikiCommons）. 在水生生态系统中，有各种各样的生物监测或生物监测方法， 仅就淡水生物而言，就报告了超过300种评估方法 。. 监测水生大型无脊椎动物的方法和指标不仅难以比较，而且在时间和空间上尤为难以扩展 ...
