- How hot is the Sun?
- What is a black hole?
- What is the largest country in the world?
- What is the population of Earth?
- How did the universe begin?
- Why do we have seasons?
Here are some of the questions you will find answers to in this book. With more than 101 carefully selected questions and answers, this book will offer you many hours of enjoyable knowledge. The variety of topics includes questions about the origin of the Sun, the construction of space stations, the internal structure of the Earth, and the evolution of species. You can use this book as a useful source of information or to spend your time pleasantly and creatively. The short and understandable text is written by expert scientists in their field, and each question and answer is accompanied by very beautiful and vivid color photographs.