1) The first modern health insurance policy was introduced in Germany in the late 19th century.

2) The speed of a sneeze can reach up to 100 miles per hour (160 kilometers per hour).

3) 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.

4) The first photograph of a black hole was captured in 2019 using a network of telescopes around the world.