1) The Great Barrier Reef in Australia is the largest living structure on Earth and can be seen from space.

2) The push for gender equality and women's empowerment has gained momentum worldwide, with increased advocacy for equal rights, representation in leadership positions, and efforts to address issues such as gender-based violence and discrimination.

3) The construction of the Great Wall of China began in the 7th century BC and was completed over several centuries, spanning thousands of miles.

4) The Dow Jones Industrial Average (DJIA) is a stock market index that tracks the performance of 30 large, publicly owned companies in the United States.