Aventuras de 60 segundos al pensamiento 2. La paradoja del abuelo ¿Será posible alguna vez viajar en el tiempo? Rene Barjavel era un periodista y escritor de ciencia ficción francés que pasaba mucho...
What do we really mean by "near" and "far"? In a way, distance is just a measure of how hard it is to get between two points. The harder to get from here to there,...
You may have heard that Einstein's theory of special relativity imposes a cosmic speed limit: nothing can travel faster than the speed of light. Well, that's wrong. All that Einstein...