Will humans be alive in 1 billion years? It is a question that has been asked for centuries and one that continues to remain unanswered. The answer to this question is not a simple yes or no, as there are many factors that must be taken into consideration.
At the most wildly optimistic estimate, our species will last perhaps another billion years but end when the expanding envelope of the sun swells outward and heats the planet to a Venus-like state. But a billion years is a long time and many things can happen in that time.
One of the most important factors in determining whether humans will still be alive in a billion years is the rate of technological advancement. If technological advancement continues at its current rate, then it is likely that humans will have the ability to colonize other planets and potentially other galaxies. This would allow us to survive any environmental changes that may occur on Earth.
Another factor that must be taken into consideration is the impact of climate change. If climate change continues to worsen, then it is likely that the planet will become uninhabitable for humans. This could mean that humans will have to find other planets to inhabit or develop technology that allows them to survive in extreme conditions.
It is also possible that humans will have evolved into a different species by then. With the rate of technological advancement, it is possible that humans will have evolved to the point where they no longer need to rely on the planet for sustenance. This could mean that humans will have the ability to survive in space or even other galaxies.
The answer to the question of whether humans will be alive in a billion years is not an easy one. There are many factors that must be taken into consideration, including the rate of technological advancement, the impact of climate change, and the potential for human evolution. While it is impossible to predict the future, it is likely that humans will still be alive in a billion years, although they may not be the same species that we are today.