“We are made out of stardust. The iron in the hemoglobin molecules in the blood in your right hand came from a star that blew up 8 billion years ago. The iron in your left hand came from another star. We are the laws of chemistry and physics as they have played out here on Earth and we are now learning that planets are as common as stars. Most stars, as it turns out now, will have planets.” YearsMadeHandsEarthLawTurnsLeftStarsCommonBloodPlanetsYears AgoPhysicsBillionsIronChemistryMoleculesStardustLeft Hand Author:Jill Tarter
“I suppose my interest in looking for life elsewhere in the universe really dates back to my teens. What teenager doesn't look up at the sky at night and think am I alone in the universe? Well most people get over it, but I never did and though I made a career more in physics and cosmology than astrobiology I've always had a soft spot for the subject of life because it does seem so mysterious.” PeopleThinkingWellsLooksDoeMadeSeemsNightUniverseInterestCareersSkySubjectsPhysicsSpotsMysteriousTeenagerLook UpOver ItElsewhereTeensGet OverCosmology Author:Paul Davies
“It is to be emphasized that no matter how many [amplitude] arrows we draw, add, or multiply, our objective is to calculate a single final arrow for the event . Mistakes are often made by physics students at first because they do not keep this important point in mind. They work for so long analyzing events involving a single photon that they begin to think that the arrow is somehow associated with the photon [rather than with the event].” ThinkingMindFirstsLongMadeImportantMatterMistakeEventsStudentsDrawsAddFinalsPhysicsObjectivesArrowsInvolvingAnalyzingPhotons Book:QED: The Strange Theory of Light and Matter Source: QED: The Strange Theory of Light and Matter