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Originally posted by Charlie Murphy
Everything comes from the sun. The plants make food from the sun, animals eat plants, we eat plants and animals. The rule of conservation of mass only works in a contained experiment, and since the sun affects us that does not apply.
Originally posted by UofCinLA
Earth actually gets heavier every day - meteorite's add significant mass to planet and it's not trivial e.g. tons per day (I thought the number was like 750 tons but I'd have to do a search)....