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What we touch. What we smell. What we feel. They’re all part of our reality. But what if life as we know it reflects only one side of the full story? Some of the world’s leading physicists think that this may be the case. They believe that our reality is a projection—sort of like a hologram—of laws and processes that exist on a thin surface surrounding us at the edge of the universe.
World Science Festival • 2014 • Physics
You've felt cold before. Sometimes it's cold outside. But what if I told you that "cold" isn't real? There's no substance or quantity called "cold" in science. We can't measure the amount of "cold" in something. Instead it's about what's NOT there.
What is Energy? The short answer is EVERYTHING. But what does that mean? Let SciShow explain.
In two mind-blowing hours, Hawking reveals the wonders of the cosmos to a new generation.
3/3 • Stephen Hawking's Universe • 1997 • Physics
Time travel is not forbidden by the laws of nature, but to build a time machine, we would need to understand more about those laws and how to subvert them than we do now. And every day, science does learn more. In this film Horizon meets the scientists working on the cutting edge of discovery - men and women who may discover how to build wormholes, manipulate entangled photons or build fully functioning time crystals. In short, these scientists may enable an engineer of the future to do what we have so far been only able to imagine - to build a machine that allows us travel back and forward in time at the touch of a button. It could be you! Science fiction?
Hurtling back in time to visit the dinosaurs is not an impossible fantasy! Dr Michio Kaku draws up blueprints for a working time machine that will let us visit the past and travel back to the future.
S1E6 • Physics of the Impossible • 2009 • Physics