l just read about wormholes and blackholes. They're simply hypothetical structures in the universe predicted by physicists. My question is, what is the basis of their prediction? Who are the people who just wakes up one day and predicts "there is a hole that sucks all of matter and light into it" and "there is an alternate universe once we travel through this tunnel called the wormhole". It seems too random and frivolous to me, because I can wake up one day and speculate the existence of something weird too. I am no expert in such abstract physics (Heck, I'm still applying for college). Any qualitative or quantitative explanation would be of much help. Thank you!
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