Ask Ethan: Why is the Big Bang shown as a tube?
Briefly

The Big Bang was not an explosion at all. Rather, the idea is rooted in the concept of expansion, and the fact that space itself does not remain static.
Over the course of the 20th century, a clear picture emerged as supported by an overwhelming suite of scientific evidence: the scenario of the hot Big Bang.
Today, 13.8 billion years after that event, humanity has been able to reconstruct our cosmic history, explaining the formation of elements, atoms, stars, galaxies, rocky planets, and eventually, intelligent life.
In many ways, it truly is the greatest story ever told: not a biblical or philosophical or poetic account of all of creation, but a scientific one.
Read at Big Think
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