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

2) Emma Stone is an American actress known for her roles in films such as "La La Land," "Easy A," and "The Help." She has received critical acclaim and several awards, including an Academy Award, for her performances, establishing herself as a talented and versatile actress.

3) The average person walks the equivalent of three times around the world in a lifetime.

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