Answerable and Unanswerable Questions

Does alien life exist? Is time travel possible? How did the universe begin, and how will it end? Is the future predetermined?

These are just some of the fascinating questions posed in this book, which stretches across physics, the life sciences and cosmology. Each chapter considers a separate question and ends with either an answer or, if there is insufficient evidence, a 'best guess' answer.

For every question addressed here - be it time travel, multiple universes, intergalactic travel, or the end of the world - the author has tried to exhaust all possibilities before arriving at a conclusion. Everyone will have their own opinion but one thing is certain: Mysteries of the Universe will fascinate, educate and stimulate.

Dr Peter Altman trained as a biochemist and now works as a science writer and speaker. His areas of special interest include cosmology, biochemistry and photography. He is the founder and chairman of the Bricket Wood Science Group and a member of the Magic Circle in London.

"I really like the premise of this book. The questions are just those that a lay person wants the answers to and the division into answerable and unanswerable makes a distinction that is not always apparent." (Andrew Norton, professor of astrophysics education, the Open University, UK)