It’s been 70 years since physicist Enrico Fermi asked his famous question: “Where is everybody?” And yet, the tyranny of the Fermi Paradox is still with us and will continue to be until definitive evidence of extraterrestrial intelligence (ETI) is found. In the meantime, scientists are forced to speculate as to why we haven’t found any yet and, more importantly, what we should be looking for. By focusing their search efforts, researchers hope to determine whether we are alone in the universe.
Click here for original story, If alien probes are already in the solar system, maybe we could detect them calling home
Source: Phys.org