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Black holes are incredibly common in the universe, with an estimated 100 million present in the Milky Way galaxy alone. They come in a variety of sizes, with the largest known having a mass of 40 billion times that of the sun. Black holes are so dense that a teaspoon of matter from one would weigh as much as an entire skyscraper. Most are found in binary systems, where they orbit a companion star.
The microchip has revolutionized computing, making it smaller, faster and more efficient. The first microchip was invented in 1958, and the first microprocessor in 1971. The first personal computer was invented in 1975, and the first laptop in 1981. The first tablet computer was invented in 2010, and the first smartphone in 2007.
The article covers a range of firsts in space and cyberspace, from the first manned spacecraft to orbit the moon (Apollo 8) to the first blog (created by Jorn Barger in 1997).
Water is the most precious resource on Earth, covering over 70% of its surface. However, less than 1% of the world's freshwater is readily accessible for human use. The average person uses 100-300 gallons of water per day, making even small leaks very wasteful. Washing machines and dishwashers are also large users of water.
1. Social media use is associated with mental health problems. 2. Most people believe that technology has made their lives easier. 3. People who use online dating sites are more likely to be successful in their relationships. 4. The majority of Americans believe that the internet is a positive force in society. 5. People who use social media are more likely to be happy with their lives. 6. People who use social media are more likely to be successful in their careers.
Google is a search engine giant that was founded in 1998 by Sergey Brin and Larry Page. Its mission is to make the world's information accessible and useful to everyone. As of June 2019 , Google is worth over $934 billion. The company's algorithm is a closely guarded trade secret.
There are more black holes in the universe than there are stars, and they are infinitely dense. They are so massive that they can warp the fabric of spacetime, and emit jets of particles at near-light speeds. They can consume anything that comes too close, including light. There may be a supermassive black hole at the center of our galaxy.
1. The word "robot" was first used in a play by Czech writer Karel Čapek in 1921. 2. The first digital computer was created in 1941 by British mathematician Alan Turing. 3. The first "smartphone" was invented in 1992 by IBM. 4. The first website was created in 1991 by Tim Berners-Lee. 5 . The first online transaction was made in 1994 by Pizza Hut. 6. The first online chat room was created in 1997 by AOL.
