1) The Industrial Revolution led to significant urbanization, as people migrated from rural areas to cities in search of employment in factories.
2) The concept of 3D printing, also known as additive manufacturing, was first introduced in the 1980s and has since revolutionized prototyping and small-scale production.
3) The sport of golf originated in Scotland and is played on courses with 18 holes, each with a designated par score.
4) The Arctic Ocean is the smallest and shallowest ocean, located at the North Pole. It is covered by sea ice for much of the year.
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