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Ask Ethan: Do white holes, the opposite of black holes, physically exist?

In general relativity, white holes are just as mathematically plausible as black holes. Black holes are real; what about white holes?Continue reading on Starts With A Bang! »

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Does the expanding Universe stretch space or create new space?

The evidence that the Universe is expanding is overwhelming. But how? By stretching the existing space, or by creating new space itself?Continue reading on Starts With A Bang! »

$$ medium.com medium.com / feeds / / #science / / 29 days 29d

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