The answer was to assume that the universe as a whole obeys CPT symmetry. They asked themselves whether there is a natural way to extend the universe beyond the Big Bang – a singularity where general relativity breaks down – and then out the other side. Instead, Turok and his Perimeter Institute colleague Latham Boyle set out to develop a model of the universe that can explain all observable phenomena based only on the known particles and fields. “I think that may turn out to be misguided.” “There is this frame of mind that you explain a new phenomenon by inventing a new particle or field,” he says. One such parameter, he says, is the brief period of rapid expansion known as inflation that can account for the universe’s large-scale uniformity. However, Neil Turok of the Perimeter Institute for Theoretical Physics in Ontario reckons that these models’ reliance on ad-hoc parameters means they increasingly resemble Ptolemy’s description of the solar system. Webinars Tune into online presentations that allow expert speakers to explain novel tools and applications.Video Watch our specially filmed videos to get a different slant on the latest science.Podcasts Our regular conversations with inspiring figures from the scientific community.Audio and video Explore the sights and sounds of the scientific world.Supercool physics Experiments that probe the exotic behaviour of matter at ultralow temperatures depend on the latest cryogenics technology.The science and business of space Explore the latest trends and opportunities associated with designing, building, launching and exploiting space-based technologies.Revolutions in computing Find out how scientists are exploiting digital technologies to understand online behaviour and drive research progress.Nanotechnology in action The challenges and opportunities of turning advances in nanotechnology into commercial products.#BlackInPhysics Celebrating Black physicists and revealing a more complete picture of what a physicist looks like. Artificial intelligence Explore the ways in which today’s world relies on AI, and ponder how this technology might shape the world of tomorrow.Collections Explore special collections that bring together our best content on trending topics.Innovation showcases A round-up of the latest innovation from our corporate partners.Projects and facilities Follow the latest progress at the world’s top scientific experiments.Policy and funding Understand how emerging policy changes could affect your work and career.Education and outreach Learn about novel approaches to educating and inspiring the scientists of the future.Business and innovation Find out how recent scientific breakthroughs are driving business innovation and commercial growth.Impact Explore the value of scientific research for industry, the economy and society.Personalities Find out who’s doing what in industry and academia.Interviews Discover the views of leading figures in the scientific community.Opinion and reviews Find out whether you agree with our expert commentators.Careers Consider your career options with valuable advice and insightful case studies.People Meet the people behind the science.Events Plan the meetings and conferences you want to attend with our comprehensive events calendar.Blog Enjoy a more personal take on the key events in and around science. Analysis Discover the stories behind the headlines.Features Take a deeper look at the emerging trends and key issues within the global scientific community.News Stay informed about the latest developments that affect scientists in all parts of the world.Research updates Keep track of the most exciting research breakthroughs and technology innovations.Latest Explore all the latest news and information on Physics World.
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