"Aristotle believed that the world did not come into being at some time in the past; it had always existed and it woul…"

"These rays, as generated in the , are not homogeneous, but consist of bundles of different wave-lengths, analogous to…"

"Now his principal doctrines were these. That atoms and the vacuum were the beginning of the universe; and that everyt…"

"Question 6. What Picks the Correct Vacuum? This is one of the great mysteries of the theory which appears, at least w…"

"Where a calculator like the today is equipped with 18,000 s and weighs 30 tons, computers in the future may have only…"

"When you look at a vacuum in a quantum theory of fields, it isn't exactly nothing."

"With respect to the ultimate constitution of... masses, the same two antagonistic opinions which had existed since th…"

"The real value of the new atomic hypothesis... did not lie in the two points which Democritus and his followers would…"

"The primitive atomic theory, which has served as the scaffolding for the edifice of modern physics and chemistry, has…"

"If Dirac’s idea restores the stability of the spectrum by introducing a stable vacuum where all negative energy state…"