1) The ongoing discussions and negotiations surrounding trade agreements, such as the United States-Mexico-Canada Agreement (USMCA) and the Regional Comprehensive Economic Partnership (RCEP), aim to strengthen economic cooperation and address trade-related challenges.

2) International relations encompass the study of relationships between nations, including diplomacy, treaties, and foreign policy. It examines the interactions and dynamics among different countries in the global arena.

3) The Beatles hold the record for the most number-one hits on the Billboard Hot 100 chart, with 20 songs reaching the top spot.

4) In Aztec mythology, Quetzalcoatl is a prominent deity often depicted as a feathered serpent. He is associated with creation, fertility, and wind, and is considered a cultural hero and patron of priests and rulers. The arrival of Spanish conquistadors was interpreted by some as the return of Quetzalcoatl.