January 21, 2010 • 1h
Just 92 elements make up the world, but the belief that were only four - earth, fire, air and water - persisted until the 19th Cen...Read more
January 28, 2010 • 1h
Professor Al-Khalili looks at the 19th century chemists who struggled to impose an order on the apparently random world of the ele...Read more
February 4, 2010 • 1h
Professor Al-Khalili uncovers tales of success and heartache in the story of chemists' battle to control and combine the elements,...Read more