14 April 1865 and 19 April 1995 Eye-witness accounts, key figures and court transcripts are used to retell tow terrorist acts which shook America. The killing of the President and the bombing of a federal office over a century apart were both committed by Americans seemingly at war with their own country.
September 1824 and 20 November 1953 Two archaeological 'discoveries' which profoundly altered our understanding of the natural world: the first unearthing of the bones of an ancient giant reptile, and the astonishing discovery of the 'missing link' between ape and man - soon to be revealed as an elaborate hoax.
12 April 1633 and 12 April 1961. Two days on which science challenged the conventional view of our place in the universe: April 12, 1633 when Galileo stands trial for heresy for claiming the sun and not the Earth is the centre of the known universe, and exactly 328 years to the day later (1961) when Soviet cosmonaut Major Yuri Gagarin steps from the Earth into space.