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

2) Robert Downey Jr. is an American actor known for his portrayal of Iron Man in the Marvel Cinematic Universe. He has also starred in films such as "Sherlock Holmes," "Chaplin," and "Tropic Thunder," and has received critical acclaim and commercial success for his performances.

3) The tongue of a blue whale is so big that about 50 people could stand on it.

4) The recent social and political movements advocating for LGBTQ+ rights have resulted in significant advancements, including the legalization of same-sex marriage in many countries and increased visibility and acceptance of LGBTQ+ individuals.