Astronomy's decades-long quest to understand cosmic topology

If some aspects of cosmic topology turn out to be true, the idea that starships might voyage across the cosmos for hundreds of thousands of light-years without ever returning to the same neck of spacetime could be problematic.

Humans or AI? Who or what can scam you more effectively?

A text from your neighborhood gardening club friend Ben offering a deal on seeds might seem too specific to be a scam. But that kind of personalization is exactly what can make phishing messages convincing.

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