Christophe wrote:I would like to see the details of the calculation but it seems plausible
This is a reflection that follows the Fermi paradox.
Agree with this conclusion:the time we have before depleting the resources at our disposal, whether at the scale of our planet Earth, or even at the scale of the observable Universe (say within a radius of 10 billion light-years, or about 100 billion billion kilometers).
Under the seemingly reasonable assumption of a growth rate of consumption and resource use of 2% per year, the depletion time of the Earth's resources is a few hundred years, with a large margin uncertainty. For the whole observable Universe, curiously, the estimate is more precise: between 5 000 and 6 000 years, with very little thing ...
... it is very likely that, like ants living on a saltpeter pile, we would grill the day we discover the matches, long before we managed to develop the interstellar journey ... https://lejournal.cnrs.fr/billets/le-pa ... invisibles
... the developed countries that are fortunate enough to have already proven research structures, put at the very top priority the development of research and development activities that alone will enable us to face the challenges ahead.