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46,000 BCE
Moon
La hipótesis del impacto gigante establece que cuando la Tierra se formó hace unos 4.500 millones de años, un objeto cercano recién formado de la mitad del ancho de la Tierra chocó con ella. Una pequeña fracción de los desechos de la corteza y el manto (la Tierra y el impactador) se propagó en órbita alrededor de la Tierra y se acumuló para formar la Luna. -
45,000 BCE
Sun
In the vastness of space, gravity has drawn in dust and gas to create a young solar system. It may seem empty, but space is full of gas and dust. About 4.5 billion years ago, waves of energy propagating through space brought the clouds closer to these particles, causing them to sometimes collapse naturally and begin to spin under the force of gravity. -
45,000 BCE
Earth
When the solar system stabilized in its current configuration about 4.5 billion years ago, Earth formed when gravity pulled swirling gas and dust toward the third planet from the Sun. Like other terrestrial planets, Earth has a core, a rocky mantle and a solid crust. -
40,000 BCE
Unicellular life
The first creature that appeared on Earth was single cells or single cells. It first appeared on earth almost 4 billion years ago. Bacteria were the first organisms on earth. They appeared in the waters of the first sea. -
40,000 BCE
Solar System
The four giant planets of the outer system are substantially larger and more massive than the terrestrials. All eight planets have nearly circular orbits that lie near the plane of Earth's orbit, called the ecliptic. There are an unknown number of smaller dwarf planets and innumerable small Solar System bodies orbiting the Sun. Six of the major planets, the six largest possible dwarf planets, and many of the smaller bodies are orbited by natural satellites, called moons after Earth's Moon. -
15,600 BCE
Multicellular life
Large multicellular life forms may have appeared on Earth a billion years earlier than previously thought. Macroscopic multicellular life dates back about 600 million years, but new fossils suggest centimeter-long multicellular life existed 1.56 billion years ago. -
13,800 BCE
Big Bang
The Big Bang is how astronomers explain how the universe began. It's the idea that the universe started out as a single point, then expanded and stretched to grow as large as it is now, and it's still expanding! -
6600 BCE
Dinosaurs
Dinosaur fossils have been found on all seven continents. All non-bird dinosaurs became extinct about 66 million years ago. Around 700 species of dinosaurs are known to have become extinct. Modern birds are a type of dinosaur because they share a common ancestor with non-avian dinosaurs. -
5000 BCE
Humans
The «Out of Africa» model is currently the most accepted model. He suggested that Homo sapiens evolved in Africa before migrating around the world. In fact, Africa has a lot of genetic diversity compared to other areas in the world put together. Therefore, scientists say that modern humans did not appear anywhere else and must have originated in one region, Africa.
Evidence suggests that the first wave of people to leave Africa were not very successful in their travels