# Mysteries of the Universe: Dark Energy and Time Perception A journey into the unknown with Geraint Lewis - **Source:** [Shirtloads of Science](https://brifing.si/source/ad5f43d4-c359-435a-9f64-bcf6b77d5fb7) - **Published:** 2026-08-29 - **Topic:** [Business](https://brifing.si/c/business) - **Original article:** - **On Brifing:** https://brifing.si/s/2d7c342d-549c-44b3-8e81-459ada3d1c4c ## The Unknowns of the Universe At the launch of 'The Shortest History of Reality', Geraint Lewis discussed dark matter and dark energy, which make up 95% of the universe yet remain unexplained. Audience members questioned their place in modern physics. Lewis highlighted how these mysteries spark curiosity in the scientific community. The fact that we only understand 5% of the universe serves as a major motivation for researchers worldwide. ## Time Perception and Experience The Q&A session explored why time feels different experientially. Lewis explained the relativistic nature of time and how human consciousness perceives it. The twin paradox example particularly illustrated the phenomenon of time dilation. This discussion demonstrated the connection between physics and everyday life experiences. ## The Speed of Light and Reality An audience question focused on whether light's speed is absolute. Lewis recalled Einstein's special relativity, emphasizing light speed as a fundamental cosmic constant. The conversation examined how this limit shapes our understanding of space-time. Theoretical implications of exceeding light speed also sparked curiosity among attendees. ## Mass and Consciousness The question about what happens to our mass after death blurred the line between physics and metaphysics. Lewis cited the scientific perspective of mass-energy conservation. However, questions about consciousness's nature shifted the discussion toward philosophy. This dialogue showed how scientific discoveries trigger profound human questions. ## The Quest for a Theory of Everything The event discussed expectations for physics' grand goal - a Theory of Everything. Lewis explained how the incompatibility between quantum mechanics and general relativity drives this pursuit. Audience members wondered how such theory might transform our lives. The methods scientists use to approach this challenging goal were also examined. ## The Importance of Science Communication Lewis shared insights on effectively communicating complex scientific concepts to the public. He reflected on his book's place in popular science writing. Attendees asked about scientific literacy's critical role in society. This dialogue offered hope for the future of science communication. ## Curiosity as Discovery's Engine Throughout the event, speakers emphasized humanity's innate curiosity about the unknown as driving scientific progress. Lewis stated that unraveling cosmic mysteries reflects human nature. Audience members discussed how this discovery impulse manifests in daily life. The conversation highlighted how this motivation inspires new generations of scientists. ## Scientific Optimism and Societal Impact Lewis explained why advancements in research provide reasons for optimism. They discussed how each new discovery about our universe might contribute to societal transformation. Audience members questioned the philosophical and ethical implications of scientific findings. This final dialogue emphasized science's hopeful potential for humanity. ## Sources covering this story - https://shirtloadsofscience.libsyn.com/live-qa-with-geraint-lewis-489 — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._