1) The term "cloud computing" refers to the delivery of computing services, including storage, databases, and software, over the internet rather than on a local server.

2) The Great Wall of China is not visible from space without aid, contrary to popular belief.

3) The study of fossils is called paleontology, and it helps us understand the history of life on Earth and the process of evolution.

4) Will Smith is an American actor, rapper, and producer known for his roles in films such as "Men in Black," "Independence Day," and "The Pursuit of Happyness." He has achieved success in both the music and film industries and has received numerous accolades for his work.