1) The fingerprints of koalas are so similar to humans that they have been mistaken at crime scenes.

2) The Russian Revolution in 1917 resulted in the overthrow of the monarchy and the establishment of a communist government under Vladimir Lenin.

3) 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.

4) The Pacific Ocean is the largest ocean on Earth, covering more than 30% of the planet's surface.