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28 votes

Would killing 444 billion humans leave any physical impact on Earth that's measurable?

This is nearly 63 trillion pounds of meat and bone, even at North Korean weights. Now I'm going to do the entirely half-assed standard-and-metric measurements, which should never be mixed. If 1 cubic ...
John O's user avatar
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21 votes

Would killing 444 billion humans leave any physical impact on Earth that's measurable?

I can think of a few issues... Your timeline is a whomping five years. That's a very long time for the world's media (e.g., CNN, BBC, etc.) to realize there's no news coming out of North Korea, which ...
JBH's user avatar
  • 125k
15 votes

Would killing 444 billion humans leave any physical impact on Earth that's measurable?

Massive regional die-off The Lake Nyos disaster is one of the creepiest natural disasters I've ever heard of. The disaster was a limnic eruption: A limnic eruption, also known as a lake overturn, is ...
Tom's user avatar
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5 votes

How much time is needed to judge an Earth-like planet to be safe?

Not all risks can be accounted for, but colonists are (by self-selection) far more comfortable with risk than most people At the end of the day, the thing about life: nobody gets out alive. Frontier ...
William Walker III's user avatar
4 votes

How much time is needed to judge an Earth-like planet to be safe?

This is a Frame Challenge: Define "safe" Millions of people died from COVID-19 in 20201 and that's after billions of years of evolution, millions of years of experience, and thousands of ...
JBH's user avatar
  • 125k
2 votes

How much time is needed to judge an Earth-like planet to be safe?

I assume the risk is something quite unexpected. They have not landed on something looking like a massive lava flow that feels still warm in parts, and seems to come from the distinctly conical ...
Richard Kirk's user avatar
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2 votes

How much time is needed to judge an Earth-like planet to be safe?

1 year for basic safety, 20 for high safety. Lots of animals and insects act on some sort of cycle and only are active in certain seasons. There's certainly a risk that some sort of weird lifeform ...
Nepene Nep's user avatar
2 votes

How much time is needed to judge an Earth-like planet to be safe?

Two or three generations. The answer by Richard Kirk mentioned the historical example of cancer by x-rays. There could be subtle things on this planet which interfere with fertility and the germline. ...
o.m.'s user avatar
  • 117k
1 vote

How much time is needed to judge an Earth-like planet to be safe?

Months It depends largely on the organization culture and if individuals are allowed to decide for themselves. As others have said 'safe' is very subjective. Assuming they can send out scout drones ...
Menno van Lavieren's user avatar
1 vote

How much time is needed to judge an Earth-like planet to be safe?

How safe do you want it to be? I will assume that "safe" means "it is no more likely to kill you prematurely than Earth is." There is a reason why there are discussions of "...
Mary's user avatar
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1 vote

Would killing 444 billion humans leave any physical impact on Earth that's measurable?

In the short term, there are certainly noticeable effects, like water/air pollution, local agricultural and ecosystem disruption, maybe local diseases and refugees. But perhaps sadly, probably not ...
alices_and_bobs's user avatar
1 vote

Evolution of classic giant mushroom forests

Welcome to the wonderful world of hybrid biology. Take something simple- like a lichen https://en.wikipedia.org/wiki/Lichen - its a fungi that brings along algae + cyanobacteria to produce sugar via ...
Pica's user avatar
  • 4,676
1 vote

Evolution of classic giant mushroom forests

Maybe the huge mushroom structures that we associate with the classic mushroom shape is only produced to shade the actual smaller spore producing structures from too much light. they grow tall and ...
Gillgamesh's user avatar
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