When Oumuamua, the first known interstellar object to visit our solar system, zipped past Earth in 2017, it left scientists with more questions than answers. Here’s why a few scientists, including Harvard’s Avi Loeb, dared to suggest it might have been alien in origin.

Was Oumuamua an alien spaceship? Harvard scientist hints it was no ordinary rock

Imagine a region of space 330 million light-years across that’s almost completely empty. That’s the Bootes Void. No galaxies, no stars, just... nothing. Some scientists even joke it looks like the universe forgot to finish that patch.

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Was Oumuamua an alien spaceship? Harvard scientist hints it was no ordinary rock

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