This game is played by two people, using small rackets, called battledores, made of parchment or rows of gut stretched across wooden frames, and shuttlecocks, made of a base of some light material, such as cork, with trimmed feathers fixed around the top.
An alternative model which once enjoyed equal status with the big bang is the steady state theory, first proposed in 1948 by Hermann Bondi, Thomas Gold, and Fred Hoyle. This model, too, assumes that the universe is expanding, but proposes that it has no beginning or end in space and time.
After watching this lesson, you should be able to: 1  Explain Aristotle's and Democritus's views of matter. 2  Identify John Dalton, J.J. Thomson, Ernest Rutherford and Robert Millikan, and describe what they each discovered about atoms. 3  Understand the methods each of these scientists used to make their discoveries.