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100 BCE
when did the First Ancestral Humans appear?
Humans first evolved in Africa, and much of human evolution occurred on that continent. The fossils of early humans who lived between 6 and 2 million years ago come entirely from Africa. -
99 BCE
when did Disappearance of Dinosaurs first appear?
The dinosaurs first appeared 247 to 240 million years ago. -
69 BCE
when was the sea formed?
3.8 billion years ago
The ocean formed billions of years ago. Over vast periods of time, our primitive oceans formed. Water remained a gas until the Earth cooled below 212 degrees Fahrenheit . At this time, about 3.8 billion years ago, the water condensed into rain which filled the basins that are now our oceans. -
34 BCE
4.54 billion years ago the earth was formed
The age of the Earth is 4.54 ± 0.05 billion years (4.54 × 109 years ± 1%). This age may represent the age of the Earth's accretion, of core formation, or of the material from which the Earth formed. -
23 BCE
when was the first life discovered on land?
3.5 billion years ago
Earliest life forms. Fossil evidence informs most studies of the origin of life. The age of the Earth is about 4.54 billion years; the earliest undisputed evidence of life on Earth dates from at least 3.5 billion years ago. There is evidence that life began much earlier. -
13 BCE
When was the universe made?
20 billion years ago
Most astronomers think that the Universe was formed during an event called the Big Bang - a giant explosion which occurred between 10 and 20 billion years ago. During the Big Bang, all of the space, time, matter, and energy in the Universe was created. -
13 BCE
Where were the galaxies made?
Image result for where were the galaxies made
Other galaxies may contain objects like quasars, the most energetic bodies in the universe, at their core. Astronomers aren't certain of exactly how galaxies formed. After the Big Bang, space was made up almost entirely of hydrogen and helium. -
12 BCE
why was the earth the third in the solar system?
When the solar system settled into its current layout about 4.5 billion years ago, Earth formed when gravity pulled swirling gas and dust in to become the third planet from the Sun. Like its fellow terrestrial planets, Earth has a central core, a rocky mantle and a solid crust. -
4 BCE
When did dinosaurs appear?
Explore the age of the dinosaurs. Discover what the prehistoric world was like and how it changed between when dinosaurs first appeared and the mass extinction at the end of the Cretaceous Period. -
69
When did religions start?
The history of religion refers to the written record of human religious experiences and ideas. This period of religious history begins with the invention of writing about 5,200 years ago (3200 BCE). The prehistory of religion involves the study of religious beliefs that existed prior to the advent of written records.
