Dava Sobel

Parallel stories: 18th century Harrison builds the marine chronometer for safe navigation at sea; 20th century Gould is obsessed with restoring it.

Brooklyn-born Ruth Gruber became the youngest PhD in the world before going on to become an international foreign correspondent and photojournalist at age 24. She defied tradition in an extraordinary career that spanned several decades. The first journalist to enter the Soviet Arctic in 1935, Ruth also traveled to Alaska as a member of the Roosevelt administration in 1942, escorted Holocaust refugees to America in 1944, covered the Nuremberg trials in 1946, and documented the Haganah ship 'Exodus' in 1947. Her relationships with world leaders gave her unique access and insight. This documentary interweaves verite scenes with archival footage.

It was one of humankind's most epic quests - a technical problem so complex that it challenged the best minds of its time, a problem so important that the nation that solved it would rule the economy of the world. The problem was navigation by sea—how to know where you were when you sailed beyond the sight of land - establishing your longitude. While the gentry of the 18th Century looked to the stars for the answer, an English clockmaker, John Harrison, toiled for decades to solve the problem. His elegant solution made him an unlikely hero and remains the basis for the most modern forms of navigation in the world today. This film will be both a celebration of Harrison's invention and an adventure story. An expedition on a period sailing vessel as it sails the open sea will demonstrate the life and death importance of finding your longitude at sea.

Based on Dava Sobel’s bestselling book, Galileo’s Daughter, this documentary reveals a new side to the famously stubborn scientist – that his closest confidante was his illegitimate daughter, Sister Maria Celeste, a cloistered nun.