Can You Travel Back In Time With Your Mind? Every time we remember something from the past or imagine something that will happen in the future, we engage in mental time travel. Scientists discovered that, whether we mentally travel back into the past or forward into the future, some of the same brain regions are
What Did Not Exist Before The Big Bang? The Big Bang wasn’t actually a bang. It was not an explosion of metal shards, like in a firework, nor any material; but the rapid expansion of space itself. At the start, the Universe was infinitely small. Did space start with the Big Bang? The Big Bang
Can A Time Machine Be Made? Although humans can’t hop into a time machine and go back in time, we do know that clocks on airplanes and satellites travel at a different speed than those on Earth. Can a time machine be built? Travelling in time might sound like a flight of fancy, but some
What Did Albert Einstein Say About Time? For example, physicist Albert Einstein’s theory of special relativity proposes that time is an illusion that moves relative to an observer. An observer traveling near the speed of light will experience time, with all its aftereffects (boredom, aging, etc.) much more slowly than an observer at rest. Who
Why Is The Universe 3 Dimensional? The scientists propose that space is 3D because of a thermodynamic quantity called the Helmholtz free energy density. In a universe filled with radiation, this density can be thought of as a kind of pressure on all of space, which depends on the universe’s temperature and its number of
How Does Speed Affect Spacetime? This form of time dilation is also real, and it’s because in Einstein’s theory of general relativity, gravity can bend spacetime, and therefore time itself. The closer the clock is to the source of gravitation, the slower time passes; the farther away the clock is from gravity, the faster time
Do We Live In A 2 Or 3 Dimensional World? We live in a universe that physicists describe as having 3+1 dimensions–three dimensions in space and one in time. … Some scientists have proposed that a universe with three spatial dimensions is the most stable kind of universe or has other physical advantages. Are humans
What Did Einstein Say About Gravity? Einstein argued that gravity isn’t a force at all. He described it as a curvature of time and space caused by mass and energy. Did Einstein say gravity is an illusion? Einstein’s general theory of relativity has an unusual answer to that question which will be explored in this
When Did Einstein Say Everything Is Relative? General relativity is physicist Albert Einstein’s understanding of how gravity affects the fabric of space-time. The theory, which Einstein published in 1915, expanded the theory of special relativity that he had published 10 years earlier. What did Einstein mean by everything is relative? A Matter of Time. …
Can You Reach The Edge Of The Universe? As far as we can tell, there is no edge to the universe. Space spreads out infinitely in all directions. Furthermore, galaxies fill all of the space through-out the entire infinite universe. … The flatness of the universe means that the geometry of spacetime is not curved