Albert Einstein is undoubtedly one of the greatest scientific minds in history. The German-born physicist developed the theory of relativity, which revolutionized our understanding of time, space, gravity, and the universe.
Lieutenant Colonel Jack Churchill, or "Mad Jack," was no ordinary soldier during World War II. This British Army officer made a name for himself by using unusual weapons like a longbow, arrows, and a Scottish broadsword.
When you think about the most precious liquids on Earth, you might conjure up images of petroleum, fine wines, or perhaps rare perfumes. But there's one creature out there whose unassuming blue blood is worth its weight in gold, and it's been saving human lives for decades without many of us realizing it.