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.
One century ago, in January 1912, Alfred Wegener presented for the first time his theory of continental drift at a meeting held in Frankfurt, in Germany (*).is theory of continental drift, presented for the first time in January of that year, started a scientific revolution in geology that deeply affected the way we understand how Earth systems work.