Avi Loeb was asked how to save our civilization from the demise of the sun billions of years from now.
, Loeb said there are lots of options for protecting humanity against the initial threat posed by a brightening sun, including those being looked at to limit the impact of global warming. Later on, he said we would need to create a"gigantic structure" that could be moved to an optimal orbital distance.
"Since modern humans needed merely 100,000 years to adapt from living in the savannahs and forests of Africa to squeezing into a tiny apartment in Manhattan one can reasonably expect them to transition from Manhattan to living in space over a time span that is ten thousand times longer," he wrote. Ultimately, our star will one day die, engulfing Earth in the process. To save mankind, Loeb wrote, humans must look to planets elsewhere in the universe. He said humans should make"genetically identical copies" of the animals and plants we want to keep and spread them out to other star systems. This would lower the risk of complete"annihilation" from a single catastrophe.
"The instinct of any parent is to care for the offspring and secure longevity this way; nature enabled us to extend the lifetime of our genome well beyond our own life span in this way," Loeb wrote."As an extension, modern science might enable us to construct printers that are capable of mass-producing copies of ourselves on other planets by merely exporting our genetic blueprint without requiring that our bodies will physically travel the distance.
Image showing a giant solar prominence on the sun. In about a billion years the sun will get brighter, eventually causing all the water in Earth's oceans to evaporate.
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