How did the universe begin?

Answer

According to the bing bang theory,between 10million to 20 million years ago,the universe began froma cosmic explosion at a single point. The exact time, location and size of that initial super-powerful explosion can not be determined because that cataclysm created space and time, as well as all the matter and energy the universe will ever hold. The early universe was extremely small, dense, and hot. For the first fraction of a second, only energy existed. It has since been expanded in all directions and has evolved from a primordial dense and hot state in a finite time in the past and continues to grow until today. As the universe expanded and cooled, the four fundamental forces (gravity, electromagnetism, and the strong and weak nuclear forces) became distinct.
2 Additional Answers
Ask.com Answer for: how did the universe begin
The Big Bang model is the most widely accepted scientific theory of the universe’s origin. It holds that 12 to 14 billion years ago, the universe was a very hot, dense, tiny ball of matter. It expanded very rapidly to form the universe we know today.
There are a few theories regarding how the universe came to begin existing. Most scientific reasoning points to a likeliness of The Big Bang Theory being true. Spiritual beliefs are a lot different from scientific ones, and as there is not actual evidence either way it is a never ending debate.
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There are three very good lecture videos, all about. Abiogenesis.
http://www.quora.com/How-did-life-begin
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