Max Pearson presents a collection of the week's Witness History episodes.For nearly 40 years, Siegfried and Roy wowed audiences in Las Vegas with death-defying tricks involving white lions and tigers. But in 2003, their magic show came to a dramatic end when a tiger attacked Roy live on stage.We find out what went wrong, and speak to magician and author Margaret Steele about the - sometimes dangerous - history of illusion and magic.Plus, we learn more about the so-called ‘Ken Burns effect’; the technique of making still photographs that appear to be moving. In 2002, the method came to the attention of one of the biggest names in the field of technology, Steve Jobs.Also, the New Zealand woman who was nicknamed ‘the Queen of the Skies’ for her record breaking flights of the 1930s. Jean Batten flew planes made of wood and canvas during the golden age of aviation.And we go back to 1996 for Brazil's early adoption of electronic voting, and discover more about the experiments behind the creation of Greenwich Mean Time.Contributors: Ken Burns - film maker Chris Lawrence - animal trainer Margaret Steele - magic historian, magician and author Carlos Velozo - lawyer Jean Batten – aviator Emily Akkermans - Curator of Time, Royal Museums Greenwich Keith Moore - the Royal Society of London(Photo: Siegfried and Roy with a white lion cub, Las Vegas, 1997. Credit: Barry King/WireImage)