1) A newborn kangaroo is about 1 inch (2.5 centimeters) long and weighs less than a gram.

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

3) The process of photosynthesis, performed by plants, algae, and some bacteria, is responsible for producing the oxygen we breathe.

4) The United Nations Security Council is responsible for maintaining international peace and security, with five permanent members (China, France, Russia, the United Kingdom, and the United States) holding veto power over resolutions.