In a previous article, Alon Retter argued the big bang was a white hole – a time-reversed black hole, the possible existence of which has been brought to popular attention by Carlo Rovelli. But the big bang and the white hole have crucial differences in their structures, which creates more questions than answers, writes Geraint F. Lewis. Where did our universe come from? What gave birth to all the matter that formed into stars, planets, and people? Astronomers tell us that our cosmos was born in a fiery event almost fourteen billion years ago and has been expanding ever since, but while this Big Bang picture accurately explains the universe’s evolution, the ultimate origin remains mysterious. A radical suggestion is that our universe is a white hole, the mirror image of a black hole, but is this physically reasonable?To answer this, we will need to understand what a white ho…
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