What device's invention was the main reason for demise of the Pony Express?
Correct answer: B. Telegraph
- A. Radio
- B. Telegraph
- C. Telephone
- D. Train
Explanation
The telegraph caused the Pony Express to become obsolete because messages could cross the country electronically instead of being carried by horseback. The transcontinental telegraph link was completed in 1861, ending the service soon afterwards.
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About Inventions and Discoveries
Inventions and Discoveries covers the people, dates, principles and practical uses behind developments such as the wheel, printing press, telephone, electricity, radio, computer, internet, vaccines and space technology. It distinguishes an invention, which creates a device or process, from a discovery, which identifies something already present in nature.
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