this post was submitted on 24 Apr 2025
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Space is BIG. Even if your asteroid idea happened, I can confidently say it won't hit us, because the numbers are so much in favor of them not. Earth is a ridiculously small target compared to the space in the solar system, and we have Jupiter that throws everything out and protects us. It's not happening, and even if it did it'll likely hit water, and even if it hits land it likely won't be near you.
Prepare for a car accident. Don't prepare for asteroid impact. Youre wasting your time and money in the later and, though the former is relatively unlikely to be needed, it's actually realistic that it may happen to you. Until you're prepared for that, for a house fire, for a break in, for a medical emergency, and for anything else that's relatively likely, you're wasting your resources.
Andromeda is going to hit the Milky way, and it likely won't do anything to most earth-like planets because the densities of both (all) galaxies are so low.
Individual low odds things don't happen frequently, but collectively they happen a lot more often because there are so many low odds things with potential to happen.
The Holocene may only run 12,000 years - it looks like the Anthropocene is the most likely end for it, but life has been evolving on Earth for 3.5(ish) billion years, making the Holocene just 0.00034% of that period, 1/300,000th in round numbers.