1) The sport of golf originated in Scotland and is played on courses with 18 holes, each with a designated par score.

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

3) The first graphical web browser, Mosaic, was released in 1993 and played a key role in popularizing the World Wide Web.

4) The first successful human heart transplant was performed by Dr. Christiaan Barnard in 1967.