How Did We Get Here?
(in 300 words, for 7-year-old children)
A long, long time ago, there was an explosion greater than anyone can imagine. It happened roughly 13,000,000,000 years ago. It was the Big Bang!
The Big Bang blew out all the matter of the Universe. Groups of matter came together because of gravity. When the matter of a group rubbed together, it got hot and round. Sometimes their center would even burn. This is how stars form. In fact, one star is very close to us. It was created by 4,500,000,000 years ago. It is the Sun!
As the Sun formed, some nearby matter passing by got caught by the
Sun’s gravity. Rotating around the Sun, groups of this matter also became round--but not too hot, because they were too small. The matter stuck together and formed planets. In fact, one planet is right below us. It is the Earth!
Earth’s matter formed lands, oceans, ponds, and puddles.
Naturally, Earth’s weather and tides created soups of liquids containing
various materials. This happened on the nearly 200,000,000 square miles of
Earth’s surface. Over hundreds of millions of years, a material developed that naturally made copies of itself. However, some copies were not perfect: they were mutants!
Some mutants made copies of themselves better than the originals could. However, mutant copies were not perfect either, so even stranger mutants were created. As weather and tides slowly moved them around, the mutants eventually took over the Earth!
Some mutants began to eat other mutants. Over time, only the best mutants would survive. Mutants developed to be quite complex. We call such mutants life!
Life developed bacteria by 3,500,000,000 years ago; sponges and worms by 500,000,000 years ago; amphibians by 350,000,000 years ago; dinosaurs and mammals by 200,000,000 years ago; and humans by 200,000 years ago.
That’s how we humans got here!