B）WANGYIZHE

 B：https://youtu.be/9P6rdqiybaw?si=oXhHv8pwpG1W4Kap

When we imagine witnessing a wormhole in reality, we might paint it as a circular or spherical structure, similar to the appearance of a black hole, but it's actually a window into the distant universe.This mysterious structure, if real, will provide us with a way to travel beyond the speed of light, allowing us to traverse the vast expanse of the universe in an instant.

However, the authenticity and working principle of wormholes remains a scientific mystery.According to Einstein's theory of relativity, space and time are not absolutely constant, but can be bent, twisted, and even torn and mended by objects.This concept of elastic space provides a theoretical basis for the existence of wormholes.In a two-dimensional metaphor, our universe can be imagined as a large slab, while wormholes are short bridges connecting two distant points that allow us to cross quickly.

However, we can only theoretically explore the existence and nature of wormholes.While general relativity raises the possibility of wormholes, it does not provide conclusive evidence that they actually exist in our universe.Moreover, even if wormholes are theoretically feasible, we face many challenges, such as how to make and stabilize wormholes and how to ensure the safety of travelers.

With regard to the types of wormholes, there is a theoretical wormhole called the Einstein-Rosen Bridge, which describes a portal connecting two parallel universes.However, this wormhole can't actually be crossed because it can lead to an infinite amount of travel time.To achieve true space travel, we need a traversable wormhole that meets a range of conditions, such as connecting distant parts of space-time, allowing two-way travel, and being large enough to accommodate travelers.

Creating a traversable wormhole requires a mysterious ingredient called "foreign matter," which has negative mass and can produce anti-gravity effects that support the opening of the wormhole.However, this foreign substance has not yet been discovered in nature, and we can only explore its properties theoretically.Some scientists believe that quantum fluctuations in space may have effects similar to those of foreign substances, but this remains an unsolved mystery.

While the concept of wormholes is imaginative and scientific, we must also be wary of their potential dangers.Wormholes could break the causal structure of the universe, leading to problems such as the time travel paradox.Therefore, in pursuing our dream of space travel, we must be careful to ensure that our actions do not cause irreversible damage to the universe.

In short, wormholes are an exciting but challenging field of science.While we're not sure if they really exist yet, through constant research and exploration, we may be able to gradually unravel the tip of this cosmic mystery.

1)What was surprising or interesting in the video?

In the video, the surprising and interesting part was the concept of wormholes as potential bridges connecting two distant regions of the universe, allowing nearly instantaneous travel. The idea that space-time can be bent and even torn apart and patched up to create such wormholes was fascinating. Additionally, the mention of “exotic matter” or “negative mass” needed to keep the wormhole open against the forces of gravity trying to close it was intriguing and raised questions about the exotic physics involved

2）What is the main topic of the video, and what do you think about it 

The main topic of the video is wormholes and their potential as a means of interstellar travel. Personally, I find this topic fascinating and thought-provoking. Wormholes, if they exist, could revolutionize space exploration, allowing us to traverse vast distances of space in a fraction of the time it would take using conventional methods. However, the challenges involved in creating, maintaining, and traversing wormholes are immense and require a deep understanding of physics and cosmology.

3) How does the topic of this video tie to what we have been discussing in class?

The topic of this video ties closely to what we have been discussing in class about the nature of space, time, and the role of gravity in shaping the universe. Our discussions on relativity, black holes, and the curvature of space-time provide a theoretical foundation for understanding wormholes. Wormholes are a hypothetical extension of these concepts, exploring the possibility of “shortcuts” through space-time that could allow us to traverse vast distances. By discussing wormholes, we can further explore the limits of our current understanding of the universe and consider the implications of such phenomena for space exploration and cosmology.