1) The Federal Reserve System, often referred to as the Fed, is the central banking system of the United States.

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

3) The Edelweiss flower, found in the European Alps, is known for its beauty and is often associated with mountaineering and alpine culture.

4) The shortest war in history lasted only 38 to 45 minutes between Britain and Zanzibar in 1896.