Einstein essay How deep is universe, what is the light speed ? Can we do travel time? All this questions have been formuled by many humans in the world, one of the characteristic how define mankind is that, a insatiable sensation of information which drive us to a constantly travel of research and know information, one of them who can fit in the group is Albert Einstein. One of his most famous and right works is define by a theory, “Theory of Relativity” Which establish how the time is perceived and how this can be relative, this was investigated by many other people, using experiments to figure out what happens. One of these examples scientist thought for explains this phenomenon was the next, Using a rockets with a wearing a watch and traveling at 300.000 KM/sec with another person standing in a place with another watch in his hand, give us as result how the watch of the person in the rocket was 2 hours ahead against the another watch. Scientist concluded that is because time goes faster when a object is going to the same light speed. Another experiment they did, was related with twins, one of them worked in spaceships and for a long time and her sister stayed in the earth, the experiment brought a surprise to the scientist and to the twin, as result the twin who traveled into spaces missions was twenty years old, however travel to space has concuences such as osteoporosis, caused due to a lot time of radiation exposure. Lastly one big answer formuled by Euclid was space is curved? This was answered by the simple fact of use a laser pointing to the space, here there is just two possibly results, one the laser will touch the “curve” of the space and return to earth the second on will be that the laser will never come back, but just will happen with a laser speed over 400.000 KM/sec which is impossible to have. Additionally many others questions were asked through the life of Einstein and scientist showing how humankind is able to unrolled big interrogations.