re: What ends life on earth?

Humans deplete our resources and irreparably damage the environment

When the network of satellites designed to control the global climate starts to attack Earth, it's a race against the clock for its creator to uncover the real threat before a worldwide Geostorm wipes out everything and everyone.

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Unless you're talking about humans there will be life in one form or another pretty much til the end.

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The sun would turn into a red giant first before burning out. Our sun as a red giant could engulf the earth or at least make the earth extremely close to the sun.

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What ends life on earth?

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God, and in whatever way he determines to do it.

People are saying asteroid but we have so much technology now that people would know ahead of time and they would know the impact zones so I imagine smart, super rich people will live in bunkers for a while. 90% of the population would die but I don’t think all life, human or animal, would extinguish. I know Stephen Hawking said it was the biggest threat to mankind and I can see it. But by the time something like that comes about, technology will increase further. NASA continues to develop and our celestial body tracking will improve. I just don’t see a scenario where one completely wipes out all life.

I actually think a solar flare could be killer but there are groups of tribes that live without technology that it wouldn’t wipe us out completely but it would do as much damage as an asteroid as far as depleting population. Think about how many people are dependent on electricity. People need medicine which is mostly kept cool by electricity. Food supplies. Cars. Surgeries. Heating and Cooling. So many things.

Nuclear War would do it to major populated areas but not all of the world would be hit by nuclear war. Life would go on in places in Africa and Madagascar and Australia, New Zealand.

Honestly AI is the most likely to me. But people confuse Artificial Intelligence with Artificial Sentience. Most AI today isn’t able to do what movies show it can do because it hasn’t reached sentience. AS is and would be able to think for itself. AI is possible but some still question whether AS is possible. If it is, it would be highly dangerous to humanity and all life, really. Robots don’t need plants, animals or even water.

A massive Kamala Queef

Gamma ray burst. It's happen here before. A known species killer.

The few life forms that would survive would have to rebulid and who knows what emerges from that goo.

Systemic wokeism

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I actually think a solar flare could be killer

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I don’t see why a solar flare would mean several billions of people all die. It would cause the complete collapse of society. A lot of people would die initially and in the chaos that would last for a long time, but there would still quite a few survivors. It’s not a zombie apocalypse.

And I don’t just mean some tribes. Some people know how to survive while others will learn how to adapt. Even if 90% of people die in this new dark age, 10% of people surviving is still a lot of people. I think society could rebuild itself after a long period of time.

It’s not like a gamma burst that would kill everyone instantly. There’s no chance of hiding from or surviving that.

The United Tstaes has used nuclear bombs twice, and we have been relatively close to full on nuclear war with Russia at least 5 times. Google Stanislav Petrov.

There have been two world wars last century. Odds are we will see nuclear crossfire again before we see tens of millions of people die in open war.