While 10K is a few orders of magnitude greater than 500, I imagine the problems may be similar... if not more extreme.
Source: https://en.wikipedia.org/wiki/Long-time_nuclear_waste_warnin...
We've also certainly... redistributed... many metals and other things around earth. Perhaps "large concentration of iron over what use to be new york" doesn't count, but arguably it should.
Sure, but nothing will encounter or observe them ever again.
Things we put into heliocentric orbits are likely to be forever, too.
> Along a similar vein many of the satellites that we put in graveyard orbits around earth at the end of their useful life will also plausibly last that long, though there is a lot more debris for them to collide with.
While they won't decay from drag in a few million years, tidal forces and photon pressure become significant over time.
like trees falling silently in desolate forests?
Trying to grasp a time span of one million years feels impossible, in the context of development of culture and technology.
It seems quite unlikely to me that we are the first such development on this rock.
"You shall not meddle with the lightcone of the recursive time-travelling super-intelligence you created?"
Strength is usually defined by the application and usually focuses on tensile / compressive strength. This is also why rebar is used in concrete, concrete has excellent compressive strength, but poor tensile strength.
There's lots of metrics for strength, also resistance to fatigue is often an important metric.
Diamond has excellent hardness, and compressive strength (diamond anvils), it's very poor in most other metrics of strength and evaporates above 450 degrees, so it's not good for anything hot.
I remember, now, but it wouldn’t be a spoiler for me.
There were also a lot of odd assumptions/conclusions about how people would behave but I put that down to a different cultural mindset (and in this sense it was pretty interesting), however some of the recurring social themes stretched credibility a bit. Also for a book that's generally held up as being hard sci-fi, the actual science aspect had some glaring flaws in pivotal events which really strained belief. (Well, either that or my understanding of astrophysics is way off...)
Death's End -Liu Cixin - The third novel in the trilogy staring with The Three-Body Problem