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1 day ago · Earth formed around 4.54 billion years ago, approximately one-third the age of the universe, by accretion from the solar nebula. [4] [5] [6] Volcanic outgassing probably created the primordial atmosphere and then the ocean, but the early atmosphere contained almost no oxygen.
- Talk
History of Earth was a Natural sciences good articles...
- Geothermal Gradient
Heat sources Earth cutaway from core to exosphere Geothermal...
- Chronology of The Universe
Overview Chronology in five stages Diagram of evolution of...
- Mass Extinctions
An extinction event (also known as a mass extinction or...
- Archean
The Archean Eon (IPA: / ɑːr ˈ k iː ə n / ar-KEE-ən, also...
- Talk
5 days ago · Claudius Ptolemy lived in the city of Alexandria in Egypt from about 100 to 170 CE. At that time Egypt was a Roman province and Ptolemy may have been a Roman citizen. A geographer and astronomer, Ptomely's book Geographia, influenced mapmakers on questions such as the size of the earth for centuries. Geographia had been translated into Arabic ...
4 days ago · Nairobi, city, capital of Kenya. It is situated in the south-central part of the country, in the highlands at an elevation of about 5,500 feet (1,680 metres). The city lies 300 miles (480 km) northwest of Mombasa, Kenya’s major port on the Indian Ocean. The city originated in the late 1890s as a colonial railway settlement, taking its name ...
- The Editors of Encyclopaedia Britannica
5 days ago · Mashhad [a] ( Persian: مشهد; [mæʃˈhæd] ⓘ) [b] is the second-most-populous city in Iran, located in the relatively remote north-east of the country [11] about 900 kilometres (560 miles) from Tehran. [12] In the Central District of Mashhad County, it serves as the capital of Razavi Khorasan Province, the county, and the district. [13]
5 days ago · CHICAGO (AP) — Grain futures were mixed Friday in early trading on the Chicago Board of Trade. Wheat for Jul. was down .75 cent at $6.9250 a bushel; Jul. corn decreased 4.75 cents at $4.61 a ...
5 days ago · Niger covers a land area of almost 1,270,000 km2 (490,000 sq mi), making it the largest country in West Africa. Over 80% of its land area lies in the Sahara Desert. The country's predominantly Muslim population of about 22 million[15][16] live mostly in clusters in the far south and west of the country.
4 days ago · Mahameghavahana dynasty. Shunga Empire. Satavahana dynasty. Indo-Scythians. The Mauryan Empire was an empire in South Asia, founded by Chandragupta Maurya in 322 BCE and lasting until 185 BCE. It was centralized through the conquest of the Indo - Gangetic Plain, with its capital in Pataliputra (modern Patna ).
