History of chemistry 1808, certain of his central ideas were soon adopted by most chemists. However, uncertainty persisted for half a century about how atomic theory was to be configured and applied to concrete situations; chemists in different countries developed several different incompatible atomistic systems. A paper that suggested a way out of this difficult situation was published as early as 1811 by the Italian physicist Amedeo Avogadro (1776-1856), who hypothesized that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules, from which it followed that relative molecular weights of any two gases are the same as
Same-sex marriage in the United States In 2015, John Lewis, a leader of the civil rights movement and a chairman of the SNCC, welcomed the outcome of the landmark civil rights case of "Obergefell v. Hodges" in which the Supreme Court of the United States struck down all state bans on same-sex marriage, stating that "races don't fall in love, genders don't fall in love—people fall in love". The NAACP, the leading African-American civil rights organization, has pledged its support for gay rights and same-sex marriage, stating that they "support marriage equality consistent with equal protection under the law provided under the Fourteenth Amendment of the