ACTIVE voice, Heinrich Hertz discovered radio waves in 1886., Alexander Graham Bell designed the telephone in 1876., Tim Berners-Lee created the World Wide Web in 1990., 1.4 billion people use Facebook every day., People upload 4 million photos on Instagram every hour., People send over 30 million WhatsApp messages every minute., PASSIVE voice, Radio waves were discovered by Heinrich Hertz in 1886., The telephone was designed by Alexander Graham Bell in 1876., The World Wide Web was created by Tim Berners-Lee in 1990., Facebook is used by 1.4 billion people every day., 4 million photos are uploaded on Instagram every hour., Over 30 million WhatsApp messages are sent every minute.

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