A dead pigeon pulled out of a man's chimney was found to have a little red capsule attached to its leg, which contained an encoded message from the D-Day landings. Problem is, today's decrypting experts can't crack it. Can your granddad help? Read More >>

How do you land 140,000 allied troops on an 5-mile long stretch of beach under heavy German bombardment? Very carefully. And to ensure the deployment of forces without stranding landing craft while juking Cmdr. Rommel out of his sneakers, the Allies employed these machines to predict the height of the tides. Read More >>