The early 20th Century was a golden age for physics with pioneers such as Max Born, Robert Oppenheimer and Werner Heisenberg working together at Gottingen University in Germany. But the rise of Hitler forced Born and many other Jewish scientists to flee into exile. Max Born's son, Gustav, tells Louise Hidalgo about his memories of the period and his father's friendship with Albert Einstein.

(Photo: A gathering of European scientists in 1927. Max Born is second from the right in the second row.)