Quantum key distribution method tested in urban infrastructure offers secure communications

In the era of instant data exchange and growing risks of cyberattacks, scientists are seeking secure methods of transmitting ...
BBC

How to measure the edge of a shape with Numberblocks

What are the rules when measuring? The pet bugs must follow the rules, otherwise they will be disqualified! 1. Always follow the line. Dottie, the red bug, walked too far by wobbling all over the line ...