Changes from Treaty of 1818
Treaty of 1818 was signed by the United States and the United Kingdom. Among other decisions, the treaty stated that the 49th Parallel would define most of the border between Canada and the United States. Older children can peruse the treaty at: Treaty of 1818.
Sydney Opera House opened in Sydney, Australia, in 1973. Despite its name, it hosts many types of artistic endeavors. About 1,500 concerts occur yearly, and over 1.2 million visitors enter its doors every year.
BepiColombo was launched in 2018. The European Space Agency and the Japan Aerospace Exploration Agency worked together to launch the space explorer. BepiColombo will travel for seven years to reach Mercury. In December 2025, it will release two probes, Bepi and Mio, to research the land formation and magnetic field of the planet. Children can visit a very interesting website, including a count-up, at: https://solarsystem.nasa.gov/missions/bepicolombo/in-depth/.