1) The Southern Ocean surrounds Antarctica and is the coldest and least-visited ocean.

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

3) The most intense cyclone ever recorded was Cyclone Tip in 1979, with a minimum central pressure of 870 millibars and maximum sustained winds of 190 miles per hour (305 kilometers per hour).

4) The legislative branch in many democracies is responsible for making laws, representing the interests of the people, and providing checks and balances on the executive branch.