What Doomed Franklin's Polar Expedition? Thumbnail Holds Clue

For 170 years, scientists, historians and amateur sleuths alike have been trying to figure out what led to the demise of the Franklin Expedition, one of the deadliest disasters in polar exploration, which left all 129 crew members dead in the Canadian Arctic. Researchers were able to reconstruct some information about the health and diet of one of Sir John Franklin's men in the weeks before his death, based on chemicals stored in his fingernail. On behalf of the British Royal Navy, Franklin set