Astronomer Royal for Scotland, Catherine Haymans, has spent decades refining her dark matter map, reiterating the unsettling truth that we don’t understand 95% of our universe. The cosmos is composed of dark matter, dark energy, and ordinary matter and could actually be much younger than we think.

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Taken From the Series: Science's Greatest Mysteries
Does science have all the answers? This series examines some of the biggest riddles facing scientists today. We've solved some of the most complex questions about our world and the universe. But the more we discover, the more problems emerge. Exactly how old is our universe? Why are the two sides of our moon so different? How did iron from space end up next to the body of Tutankhamun? Each film in this series tackles a single question, visiting the cutting-edge labs running mind-bending experiments and meeting the dedicated scientists searching for answers.

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