The Earth is constantly changing.
plant and animal species have become extinct because of human activities over that period. As the human population grows, to roam. Sea level rise means even less land, and rising temperatures will send many species migrating to better climates.
Not all of Earth's changes are caused by humans, but humans have worsened some of them. A major challenge today is getting people to stop doing things that create problems, like burning fossil fuels that contribute to climate change. This is one global problem that requires countries worldwide and the people within them to work toward the same goal.
Getting back to Christopher Columbus, he probably couldn't have imagined a highway full of cars or a mobile phone. Technology will no doubt improve over the next 500 years, too. But so far, tech solutions haven’t scaled up fast enough to solve climate change. To keep doing the same things and expect someone else to fix the mess later would be a risky, So, the Earth in 500 years may be unrecognizable.
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