The Known Unknowns: The Unsolved Mysteries of the Cosmos

The Known Unknowns is a book by Lawrence Krauss that explores cosmology's greatest unanswered questions, such as how did our Universe begin, how big is it, what's at the bottom of a black hole, and how did life on Earth arise. It also invites readers to ponder and appreciate the universe in which we live.

Format: Hardback
Length: 272 pages
Publication date: 11 May 2023
Publisher: Bloomsbury Publishing PLC

Cosmology is a fascinating field of study that seeks to understand the origins, structure, and evolution of the universe. Over the past few centuries, scientists have made significant progress in our understanding of cosmology, but many questions remain unanswered. In this essay, we will explore some of the most important questions in cosmology and discuss the progress that has been made in answering them.

One of the most fundamental questions in cosmology is "What is the origin of the universe?" Scientists have been trying to answer this question for centuries, but the answer remains elusive. There are several theories about the origin of the universe, including the Big Bang Theory, which suggests that the universe began as a point of infinite heat and density that expanded outward over time. However, there are still many unresolved questions about the Big Bang Theory, such as what caused the initial expansion, what the initial conditions were, and what the fate of the universe will be.

Another important question in cosmology is "How did the universe become so large and complex?" Scientists have been studying the expansion of the universe since the early 20th century, and they have made remarkable progress in understanding the mechanisms that drive the expansion. One of the most important discoveries in cosmology was the discovery of dark energy, a mysterious force that accounts for about 68% of the mass-energy in the universe. Dark energy is believed to be the result of the gravitational pull of dark matter, a mysterious substance that makes up about 27% of the mass-energy in the universe.

Another important question in cosmology is "What is the fate of the universe?" Scientists have been studying the expansion of the universe and the behavior of matter and energy in the universe for decades, and they have made some progress in understanding the fate of the universe. One of the most popular theories about the fate of the universe is the Big Crunch Theory, which suggests that the universe will eventually collapse back into itself in a massive explosion. However, there are still many unresolved questions about the Big Crunch Theory, such as what caused the initial expansion of the universe, what the initial conditions were, and what the fate of the universe will be after the Big Crunch.

In addition to these fundamental questions, cosmology also involves studying the behavior of matter and energy at the smallest scales, such as the behavior of atoms and subatomic particles. Scientists have made significant progress in understanding the behavior of matter and energy at the smallest scales, such as the behavior of black holes, neutron stars, and quasars. However, there are still many unresolved questions about the behavior of matter and energy at the smallest scales, such as what the fundamental forces of the universe are, what the nature of dark matter and dark energy is, and what the fate of the universe will be after the Big Crunch.

In conclusion, cosmology is a fascinating field of study that seeks to understand the origins, structure, and evolution of the universe. While scientists have made significant progress in our understanding of cosmology, many questions remain unanswered. By continuing to study the universe and exploring new theories and discoveries, we can gain a deeper understanding of the mysteries of existence and the incredible complexity of the cosmos.

Weight: 474g
Dimension: 162 x 242 x 27 (mm)
ISBN-13: 9781801100649