Depending on the nature of communication you're looking for, reading brainwaves in order to communicate with a computer is probably the most advanced form of communication. Paralyzed people can communicate with a computer using a helmet that reads their brainwaves, allowing them to manipulate a mouse using thoughts. The technology isn't perfect, but does allow rudimentary control such as "up", "down", "left", "right", and "click."
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i guess ancient is telegrams and modern would be email, phone like that kind of stuff but this answer has not been researched so i warn you it is best to read it up.
Modern ways of transmitting information rely on advanced technology, such as the internet, smartphones, and instant messaging, allowing for instantaneous communication across vast distances. In contrast, ancient methods included oral storytelling, written texts on materials like papyrus or stone, and messenger services, which were often slower and more localized. Additionally, modern communication facilitates multimedia content, while ancient methods were primarily text-based or verbal. Overall, the speed, accessibility, and complexity of modern communication vastly differ from the more limited and slower ancient practices.
Horsed and boat couriers.
He used methods that he though of in his head.
Discuss the purification methods used in the olden days