Early Beginnings
- 440 BC Democritus speculates about fundamental indivisible particles—calls them "atoms"
- 2nd century BC Kanada theorizes the existence of four kinds of atoms, which could combine to produce diatomic and triatomic molecules.
Read more about this topic: Timeline Of Atomic And Subatomic Physics
Famous quotes containing the words early and/or beginnings:
““Never hug and kiss your children! Mother love may make your children’s infancy unhappy and prevent them from pursuing a career or getting married!” That’s total hogwash, of course. But it shows on extreme example of what state-of-the-art “scientific” parenting was supposed to be in early twentieth-century America. After all, that was the heyday of efficiency experts, time-and-motion studies, and the like.”
—Lawrence Kutner (20th century)
“The frantic search of five-year-olds for friends can thus be seen to forecast the beginnings of a basic shift in the parent-child relationship, a shift which will occur gradually over many long years, and in which a child needs not only the support of child allies engaged in the same struggle but also the understanding of his parents.”
—Dorothy H. Cohen (20th century)