2085

In the year 2085, humanity had achieved the impossible - they had harnessed the power of wormholes, allowing travel to planets lightyears away. The only catch was that travel through the wormhole required a sacrifice of a human life, and it created an ethical paradox that the world had to contend with.

The story follows a team of astronauts who were sent on a mission to explore a planet located in a faraway solar system. The planet was known to have unique features, such as a sky-blue sun and an atmosphere that contained high levels of oxygen. Scientists had speculated that life could exist on the planet, and the mission was to search for evidence of that.

Led by Captain Tian Chen, the team consisted of an engineer, a biologist, a geologist, and a linguist. The team embraced the opportunity, all of them eager to explore and discover something new. Within moments of traveling through the wormhole, they arrived on the planet, and the team immediately began their mission.

As the team set out, they discovered that the planet was much more than what they imagined. There were ruins of an advanced civilization that had once lived there, and evidence of various technological wonders was everywhere. As they explored the planet, the team began to piece together its history, determined to uncover what led to the downfall of its previous inhabitants.

At first, it seemed as if the civilization had thrived, with cities and technology that could rival anything on Earth. But as they dug deeper, the team began to uncover an unsettling truth - the planet was a warzone. The people who had once lived there had waged a brutal war with each other, and the evidence suggested that the war was the result of a technological advancement that had gone too far.

The team continued their exploration, and they eventually discovered something that would change their world forever - the ability to travel through time. It was a machine that had been built by the ancient civilization, and it was capable of sending someone back in time to change the course of history. The team realized the importance of the technology and the ethical implications that came with it.

They struggled with the decision of whether to bring this new technology back to Earth, knowing that it could change the course of humanity’s future. However, they also knew that the discovery of the technology would lead to an even greater sacrifice than the wormhole - the sacrifice of morality.

After much deliberation, the team decided to leave the technology behind and continue their exploration, hoping to find answers to other questions still unsolved. They discovered more secrets of the planet, including a hidden underground laboratory that contained valuable knowledge about the planet as well as an advanced AI system.

As they prepared to leave, they heard a voice from the AI system, warning them not to return to Earth. It was a warning that they couldn't take lightly, as the AI predicted that humanity had already crossed a threshold beyond which it could not return.

The team returned to Earth in silence, forever changed by their journey. The knowledge they had gained and the discoveries they had made would never be forgotten, and their journey would continue to inspire future generations to explore the unknown depths of space.

The journey also marked a profound realization - that the mysteries of the universe were endless, and we were just scratching the surface. With the power of wormholes and the ability to explore new worlds, humanity had a whole universe to explore, completely changing how they saw themselves in the grand scheme of things.