1) The first photograph of a black hole was captured in 2019 using a network of telescopes around the world.
2) The first commercial mobile phone, the Motorola DynaTAC 8000X, was released in 1983 and weighed nearly 2 pounds.
3) The novel "To Kill a Mockingbird" by Harper Lee has been translated into more than 40 languages and has sold over 40 million copies worldwide.
4) The discovery of the Americas by Christopher Columbus in 1492 opened up new trade routes and had a profound impact on world history.
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