* Astronomy

Albert Einstein's best known equation: E=mc², published in the fourth of a series of papers that shook the foundations of physics in 1905, E=mc² is now linked with the power of the atom bomb.

The equation was final proof of the genius and imagination of the young German-born scientist who had yet to land a university post.
The simple three letters standing for energy, mass, and the speed of light, encapsulated the idea that as you accelerate an object, it not only gets faster, it also gets heavier.
That in turn makes further pushing less fruitful so that eventually nothing can be accelerated beyond the speed of light.
The equation rounded out the theory of relativity he had started earlier in the year.
Einstein soon recognised through the equation that the energy released in radioactivity - a phenomenon hardly understood at the time - might lead to measurable changes in mass.
That idea was eventually to be translated into the physics of the atom bomb.