Why Interstellar Travel Is Physically Impossible _ The Barrier the Universe Built
The laws of physics are the universe's most effective barrier against star travel. Reaching even the nearest star within a human lifetime would require near-light-speed, but any craft with mass requires infinite energy to reach that limit. The faster it goes, the more colossal the fuel problem. Scientists have strong indications that sci-fi shortcuts like wormholes are forbidden by physics. The universe has made it virtually impossible to leave home, a fact that answers Fermi's question: "Where is everybody?
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