Help me please! Vocabulary: scientific breakthroughs, celestial bodies, human anatomy, chemistry elements 1 The periodic table of the elements - Dmitri Mendeleev - 1869 This Russian chemist organised all of the chemical 1) … into groups based on their 2) and left spaces for new elements to be discovered. This information is known as the periodic table of the elements and is used all over the world. 2) The Big Bang Theory - Georges Lemaître - 1920s A Belgian physicist and astronomer was the first to suggest that our 3) is expanding from a single point. His ideas became known as the Big Bang Theory which is one theory for how the universe was created. 3 DNA structure - James Watson & Francis Crick - 1953 5? American scientist James Watson and British scientist Francis Crick discovered that our 4) is not flat, but a 3D structure that twists around in a double-5) Вставить нужные слова в предложения