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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