Alan Stern, principal investigator for NASA’s New Horizons mission to Pluto, and a planetary scientist at the Southwest Research Institute in Boulder, Colorado, has a new answer for one of the oldest conundrums in astrobiology. If alien civilizations exist, why can’t we find them?
It’s a puzzle known as the Fermi Paradox, and Stern’s answer is an unusual one. Perhaps, he said this week at a meeting of the American Astronomical Society’s Division for Planetary Sciences in Provo, Utah, aliens exist, but are trapped in subsurface oceans on cold worlds such as Saturn’s moon Enceladus or Jupiter’s moon Europa.
Not to mention flying around in Earth's skies and walking around its surface. To read more, click here.