Many of the world's most dangerous illnesses are caused by tiny living things called bacteria. Bacterial sicknesses once killed countless people. However, thanks to drugs called antibiotics, many types of deadly bacteria are no longer a major problem. Readers will find out how scientists first began studying bacteria, how they created the earliest antibiotics, and how bacteria and antibiotics could change in the future.

Though explorers have been searching Earth's deepest waters for many years, experts estimate that we have explored only about five percent of the global ocean. Readers will learn about the history of deep-sea exploration, from the creation of the earliest submersibles to today's high-tech expeditions to the planet's deepest points. They will also find out what we've discovered underwater so far and what lies in store for the future of deep-sea exploration.