Human Body & Mind Medicine & Disease Barney Clark received the first permanent artificial heart 40 sec read
Earth & Climate Geology The oldest piece of Earth is a crystal older than the rocks around it 75 sec read
Language & Communication Etymology "OK" started as a deliberately misspelled joke in 1839 60 sec read
History Archaeology Pompeii's famous body casts are plaster poured into human-shaped holes 65 sec read
Human Body & Mind Medicine & Disease The first documented human blood transfusion was performed 45 sec read
Culture & Arts Performing Arts The first New Year's Eve ball drop was held in Times Square 40 sec read
Religion & Beliefs Sacred Texts The Quran was first compiled from memory and scattered scraps 70 sec read
Religion & Beliefs Sacred Texts The world's oldest dated printed book is a Buddhist scroll from 868 CE 45 sec read
Religion & Beliefs Ancient Beliefs The Nazca Lines may have been giant pathways walked in ritual 45 sec read
