“We became astronomers thinking we were studying the universe, and now we learn that we are just studying the 5 or 10 percent that is luminous.” ThinkingUniverseStudyPercentLuminousAstronomers Author:Vera Rubin
“In terms of the most astonishing fact about which we know nothing, there is dark matter and dark energy. We don't know what either of them is. Everything we know and love about the universe and all the laws of physics as they apply, apply to four percent of the universe. That's stunning.” KnowsMatterFactsLawUniverseEnergyTermDarkFourPercentAnd LovePhysicsAstonishingStunningLaws Of PhysicsDark MatterDark Energy Author:Neil deGrasse Tyson
“Ninety-nine percent of humanity does not know that we have the option to "make it" economically on this planet and in the Universe. We do.” KnowsDoeWisdomHumanityUniversePoliticsEconomyPlanetsPercentNineLiberalismNinetyNinety Nine Book:Critical Path Source: Critical Path
“85 percent of the gravity of the universe has a point of origin about which we know nothing.” KnowsUniversePercentGravity Author:Neil deGrasse Tyson