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(1882) -- Nathaniel Egleston, who was writing then about deforestation, but speaks equally well about the danger of climate change today.Carl Sagan: In science it often happens that scientists say, ' You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. I cannot recall the last time something like that happened in politics or religion.

He built an extremely small vibrator source capable of generating 4-6 mm waves, which he used to demonstrate the first observation of douible refraction of electromagnetic waves in crystals of rhombic sulphur.« .if the facts are right, then the proofs are a matter of playing around with the algebra correctly.

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