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The last common ancestor of all extant eukaryotes is thought to have lived around 1.8 billion years ago. Around 800 million years ago, there was a notable increase in the complexity and number of eukaryotes species in the fossil record. [133] Before the spike in diversity, eukaryotes are thought to have lived in highly sulfuric environments.
The past can be quite fascinating.Those of us living in the present find it really interesting what life was like 50, 100, or even a 1,000 years ago. Luckily, we can go almost 200 years to the ...
1,000 km 3 (239.9 cu mi) intracaldera rhyolitic lava flows. [2] Galeras, Andes, Northern Volcanic Zone, Colombian department of Nariño: 150 ka: 2 km 3 (0.5 cu mi) of tephra: Kos-Nisyros Caldera, Greece: 161 ka: 110 km 3 (26 cu mi) Kos Plateau Tuff. [1] Taal Caldera, island of Luzon, Philippines: between 500 and 100 ka: 6?
The Ontong Java Plateau forms from 125 to 120 million years ago; Paraná and Etendeka traps, Brazil, Namibia and Angola form 128 to 138 million years ago. 132 million years ago, a possible supervolcanic eruption occurred, ejecting 8,600 cubic kilometers (2,063 cu mi). [90] Formation of the Karoo-Ferrar flood basalts begins 183 million years ago.
The Ca-Al-rich inclusions, which formed 2 million years before the chondrules, [1] are a key signature of a supernova explosion. c. 4,567 ±3 Ma – Rapid collapse of hydrogen molecular cloud , forming a third-generation Population I star , the Sun , in a region of the Galactic Habitable Zone (GHZ), about 25,000 light years from the center of ...
The mighty baobab has grown across mainland Africa, Madagascar and Australia for millions of years. But until now, scientists disputed where they came from. Finally, an answer to a mystery ...
Archaeologists found 50 Viking-era skeletons in Åsum, Denmark.. Dating back to the 9th or 10th century, the graves are evidence of international trade. The area's growth was influenced by these ...
1,000 Last large eruption in the Yellowstone National Park area estimated energy yield 875,000 megatons of tnt [39] [9] [10] Awasa Caldera: 1.09 Main Ethiopian Rift: 1,000 [40] Cerro Galán: 2.2 Catamarca Province, Argentina 1,000 Elliptical caldera is ~35 km wide [41] Paintbrush tuff (Tiva Canyon Member) 12.7 Southwestern Nevada 1,000