 This may be the culprit, something in space which exerts a gravitational force on visible matter. But for now, and like myself, many of us, space is still dark, but I'll keep you posted on that story. Moving on to astronomy rapidly, the Fermi Paradox, George, has been revisited. What is it? In 1950, Nobel laureate and physicist Enrico Fermi asked, where are they in reference to extraterrestrial life? With all the stars and galaxies out there, why have we not been able to detect them?