Hypatia is believed to have invented or significantly improved the astrolabe, a tool used for astronomical calculations and navigation. elaborate
Nelson Mandela was a qualified lawyer. elaborate
Hildegard of Bingen composed music, some of which is still performed today, making her one of the first known female composers in Western history. elaborate
Guru Nanak, despite his spiritual significance, was also a skilled businessman in his early life. elaborate
Nikola Tesla claimed to be able to induce sleep in others using only his mind. elaborate