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SPACE The 4th Dimension To do with shapes What is space? 2Dworld and 2D'ers Curved space Is there really a 4th dimension? Matters of Some Gravity Apples and moons Einstein's gravity Free fall Rubber space Twinkle, twinkle Cooking the elements Champagne supernova in the sky The Universe The night sky How big is the Universe? The expanding Universe Hubble, bubble ... Space is stretching Did the Big Bang really happen? The edge of space A closed universe An open universe What shape is the Universe then? Invisible matter 1998: a big year in cosmology Is the Universe infinite? Why is it dark at night? Before the Big Bang? Summary Black Holes More to light than meets the eye! Invisible stars Beyond the horizon A hole that can never be filled Spinning black holes Falling into a black hole To see a black hole Not so black after all White holes TIME Times Are Changing What is time? Who invented time? The first moment Does time flow? Something called entropy Arrows of time Stephen Hawking gets it wrong A possible solution Einstein's Time What is so special about special relativity? The two faces of light Thought experiments and brain-teasers Slowing down time Shrinking distances Light-the world speed record When time runs backwards Little green men Fast-forward to the future Spacetime-the future is out there Gravitational times Time Travel Paradoxes The Terminator paradox Trying to save the dinosaurs Mona Lisa's sister No way out? Parallel universes Where are all the time travelers? TIME MACHINES Wormholes A bridge to another world Alice through the looking glass When science fact met science fiction Wormholes-keeping the star gate open Visiting a parallel universe How to Build a Time Machine Time loops The Tipler time machine Cosmic string time machines A recipe for a wormhole time machine Insurmountable problems? What Do We Know? The mother of all theories The end of theoretical physics What might new experiments tell us? Astronomy versus astrology The fascination of science Suggestions for Further Reading Index
Jim Al-Khalili is a professor of physics at the University of Surrey. While still an active researcher in theoretical physics, Dr. Al-Khalili has become a well-known science communicator in the UK, with regular appearances on television and radio science documentaries. He was awarded the Royal Society Michael Faraday Prize for science communication in 2007 and the Institute of Physics Kelvin Medal in 2011. He became an Officer of the Order of the British Empire (OBE) for services to science in 2008.