1) In Aztec mythology, the god Quetzalcoatl is associated with the planet Venus, which was seen as a celestial embodiment of his power. His connection to Venus also ties into his association with fertility, renewal, and the cycles of life, as Venus is associated with beauty, love, and abundance.

2) The United Nations (UN) is an international organization founded in 1945 with the goal of promoting peace, security, and cooperation among nations through diplomatic and political means.

3) The smallest unit of time is known as a zeptosecond, which is equal to one trillionth of one billionth of a second.

4) The global economy has experienced fluctuations and challenges, including the impact of the COVID-19 pandemic on businesses, supply chains, and employment, as well as efforts to address income inequality and promote sustainable economic growth.