Imagine you go to a zoology conference. The first speaker talks about her 3D model of a 12-legged purple spider that lives in the Arctic. There’s no evidence it exists, she admits, but it’s a testable hypothesis, and she argues that a mission should be sent off to search the Arctic for spiders. The second speaker has a model for a flying earthworm, but it flies only in caves. There’s no evidence...
No one in physics dares say so, but the race to invent new particles is pointless
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