Estimating Alien Nutrition: Energy Needs and Diet Scenarios for Hypothetical Beings

To the point

There is no evidence of alien visitors, and any hypothetical beings would have unique energy needs and diets shaped by biology, so contact would require nutrition experts to assess tolerable foods and microbes, making the encounter about energy exchange rather than conquest.

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independent.co.uk

If aliens arrived on Earth tomorrow, here’s what scientists think they’d eat

With the release of Disclosure Day, Steven Spielberg’s new film about aliens, a question as old as science fiction itself resurfaces: if aliens were to arrive on Earth, would they come to conquer us, to study us… or perhaps to eat?