1) Norse mythology, originating from the Scandinavian region, features gods and mythical creatures like Odin, Thor, Loki, and Valkyries. It explores themes of heroism, destiny, and the battle between gods and giants, with intricate tales recorded in texts such as the Prose Edda and Poetic Edda.

2) The concept of compound interest can be attributed to the ancient Babylonians, who used it in their banking practices.

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

4) The study of fossils is called paleontology, and it helps us understand the history of life on Earth and the process of evolution.