Just think about two villages situated on opposite sides of the mountain. Most likely, people have to travel around the mountain to visit one another. How can we reduce the travel time and distance between those villages? Yes, you are correct; they could dig a tunnel in a mountain to create a shortcut. Same idea behind wormhole science. A wormhole is like a tunnel between two far points in the universe that reduces the travel time between the two points. Instead of traveling for many light years from one galaxy to another, Theoretically, wormholes can reduce the travel time to hours or minutes by acting as time machines. You might emerge from one end of a wormhole at a time earlier than when you entered the other end. However, scientists still have no evidence that wormholes exist in our world or solar system. They are good theoretical tools to understand spacetime and time travel. The constant pull of gravity affects every object in the universe, including Earth. So gravity would have an effect on wormholes, too. The scientists who are skeptical about wormholes believe that after a short time, the middle of the wormhole would collapse under its own gravity, unless it had some force pushing outward from inside the wormhole to counteract that force. The most likely way it would do that is by using what’s called "negative energies," which would oppose gravity and stabilize the wormhole. But as far as scientists know, negative energies can be created only in amounts much too small to counteract a wormhole’s own gravity. It’s possible that the Big Bang created teeny, tiny wormholes with small amounts of negative energies way back at the beginning of the universe, and over time these wormholes have stretched out as the universe has expanded. While wormholes are interesting objects to think about, they still aren’t accepted in mainstream science. But that doesn’t mean they’re not real—black holes, which we astrophysicists know abound in our universe, weren’t accepted when scientists first suggested they existed, back in the 1910s. Einstein first formulated his famous field equations in 1915, and German scientist Karl Schwarzschild found a way to mathematically describe black holes after only one year. However, this description was so peculiar that the leading scientists of that era refused to believe that black holes could actually exist in nature. It took people 50 years to start taking black holes seriously—the term "black hole" wasn’t even coined until 1967. The same could happen with wormholes. It may take scientists a little while to come to a consensus about they can exist. But if they do find strong evidence pointing to the existence of wormholes—which they may be able to do by looking at odd movements in star orbits—the discovery will shape how scientists see and understand the universe.
Science fiction writers use wormholes in their movies and novels. However, astrophysicists have never found a wormhole in our universe. Dr. Albert Einstein's relativity theory, created in 1945, suggested the existence of an expanding universe, black holes, and gravitational waves. However, at the time, physicists believed that these predictions and the relativity theory were just mathematical curiosities. But over a century later, Einstein's predictions have been confirmed. A wormhole is a possible outcome of Einstein's theory. However, scientists have not yet observed a wormhole in the universe, except in science fiction movies and novels.
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