Dr Elizabeth Bruton explores more about how in the First World War, carrier pigeons were used to send short messages on land, in air, and at sea.
Science Museum volunteer Stephen Dalziel takes us back to 1950s England to explore the bizarre story of the Krogers.
Top Secret volunteer Sheila Mair explores the evolution of scrambler phones used during the Second World War.
Newly released MI5 files reveal for the first time that the Portland Spy Ring, one of the Soviet Union’s most successful spy rings in the UK, could have been caught four years earlier if the Admiralty had listened to the ex-wife of one of spy ring’s members.
Follow this interactive trail and go on a journey of exploration and discovery around the Science Museum.
The Science Museum’s forthcoming exhibition, Top Secret: from Ciphers to Cyber Security, featured at the Cheltenham Science Festival.