A major change is coming to supermarket checkouts soon.
Researchers say the discovery of the oldest known recordings of whale sounds could open up a new understanding of how the huge animals communicate.
A legendary code-breaking story, secret wartime inventions and the fascinating history of cryptology displayed in the National Technical Museum in Prague.
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The patent for the telephone turns 150 today, the first call was made three days later on March 10, 1876.
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