One of the most puzzling questions in modern cosmology is why the density of matter and energy appears to be find tuned to the value that allowed life to evolve. For example the density of mass to energy in the early universe must have been very close to a specific value to explain how stars … Read more
Here is an amazing fact: The matter we know that makes up all stars and galaxies only accounts for 5% of the content of the universe. The rest is called dark matter. It does not interact with the electromagnetic force and therefore does not absorb, reflect or emit light, making it extremely hard to spot. … Read more
In 1928 Paul Dirac developed through complex mathematical calculations a theory that integrated quantum mechanics, used to describe the subatomic world, with Einstein’s Special Relativity, which says nothing travels faster than light. However, he soon realized his equations not only worked for an electron with negative charge. It also worked for a particle that behaves … Read more
The fact that we need two theories to explain the evolution of our universe means that one of them must have originated before the other. For example Einstein’s relativistic and gravitational theories can explain predict the evolution of the large scale structure and movement of the stars and planets but cannot explain the structure of … Read more
Understanding what time is and its causality is not easy in part because it is something that cannot be seen or touched. For example some define it only in the abstract saying that is an invention of the human consciousness that gives us a sense of order, a before and after so to speak. In … Read more