From the ground breaking and life saving to the wacky and implausible, Dr Karl Kruszelnicki reveals some of the best moments in science.
http://www.abc.net.au/radionational/programs/greatmomentsinscience/
How the earth is round
Even in this day and age there are people who think that the earth is flat. The educated people of ancient Greece - about two and a half thousand years ago - had already figured out that the Earth was round. They observed the data that was right in front of them.