Sometime in the future …
Neither space colonization nor solving Earth’s environmental crisis happened.
A team of scientists, desperate to save Earth’s legacy, launched a time capsule into deep space.
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Besides storing all known knowledge, the time capsule included biosamples and genetic code, with mathematical instructions for the rebirth of humankind and other lifeforms.
Several millennia later …
An alien salvage crew discovered the time capsule.
“What’s in it?”
“Looks like a time capsule, sir.”
“Alright, but anything useful?”
“Yes, sir, it’s equipped with solar sails and a star map to its home coordinates.”
“Oh, that’s profit! Inform the fleet!”