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Answer
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George Gamow (1940s), Aleksandr Friedman (1920s), and George LeMaitre (1920s), developed this account of the origin of the universe based in part on Einstein's theory of relativity.
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13.8 BYA: the Big Bang
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When the population of this city reaches 10,000, it may be the largest city in the world.
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When its population reaches 10,000 in 3500 BCE, Uruk, in Sumeria (modern Iraq), becomes one of the largest cities in the world.
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There are 300 billion stars in this galaxy
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13 BYA: the Milky Way
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Some of the first adopters of this transformative technology emerged near the end of the Ice Age in southwest Asia.
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Farming: around 14.5 KYA, hunters and gatherers begin turning their stone-tipped spears into ploughs.
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When the population of this city reaches 60,000, it may be the largest city in the world.
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When its population reaches 60,000 in in 2000 BCE, Memphis becomes one of the largest cities in the world.
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Near this town in the Yucatan peninsula is the site of an aseteroid strike that caused global destruction.
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Near Chicxulub, Mexico, an aseteroid strike causes global destruction in 65 MYA
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Near Puente Viesgo in Cantabria (Spain) and Hohle Fels cave in Baden-Wurtenberg (Germany), Ice Age innovators create something unprecedented in world history.
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Art: 39 KYA, artists begin creating paintings (at El Castillo cave in Spain), and 36 KYA they create sculptures (left behind in Hohle Fels cave in Germany).
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Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune begin orbiting the sun.
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4.5 BYA, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune--8 planets begin orbiting the Sun.
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The earliest writing system in the world was created by merchants and administrators in this nation.
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In Sumer (southern Iraq),the earliest writing system in the world was created around 3000 BCE.
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Answer
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The first animals are members of this phylum, which includes the corals, hydras, jellyfish, Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans.
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635 MYA, algae stimulates cells that take on separate functions and work together as a single organism: an anima--from the cnidaria phylum.
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For 3800 years, this monolith is the world's tallest structure.
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King Kufu's burial tomb, the Great Pyramid at Giza, is completed in 2560 BCE.
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Civilization is reshaped by the development of agricultural economies in the valleys of these five rivers.
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Civilization is reshaped by the development of agricultural economies in the valleys of the Tigris, the Euphrates,the Nile, the Indus and the Huang He rivers between 5000 and 500 BCE. |
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This legendary king's adventures are the subject of the world’s oldest surviving literary text,
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In 1700 BCE, the Epic of Gilgamesh describes a king who lived in Uruk (southern Iraq) 800 years before.
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This celestial orb accounts for 99.86% of the total mass of the Solar System.
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4.6 BYA, the Sun forms.
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Discovered at the Ledi-Geraru research site in Ethiopia’s Awash River valley in 2013, a jawbone is the oldest fossil specimen attributed to this primate genus.
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2.8 MYA, the primate genus Homo emerges.in Ethiopia, Kenya and Tanzania
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The best-known person in Egypt's history becomes pharoah at the age of 8.
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Ay, an "advisor," is the power behind the throne when Tutankhamun becomes Pharaoh in 1334 BCE at the age of 8 and agrees to return the Egyptian capital to Thebes.
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When the population of this city reaches 75,000, it may be the the largest cities in the world.
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The population of Thebes reaches 75,000 in 1500 BCE making it one of the largest cities in the world.
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Discovered near Jebel Irhoud, Morocco, skull fragments, a jawbone, and stone tools are the oldest known remains of this species.
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315 KYA, the first anatomically modern humans--Homo Sapiens--leave tools behind in Morocco.
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