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A theory
James Clerk Maxwell theorized, sending information without the use of telephones https://school.eb.com/levels/middle/article/radio/276636 -
Proven correct
German professor Heinrich Hertz proved Maxwell's theory correct with experiments. -
First antenna
Italian innovator Guglielmo Marconi put an antenna on the radio and as able to send signals from a mile away -
government takes action
The British government takes an interest to the radio after the Italy turns it down, and begins to have experiments across the Atlantic ocean -
Sending a voice
Reginald A. Fessenden later finds a way to send actual voices across distances