Objective source of e-learning

Infinitely interesting topics such as quantum physics, parallel universes, dark matter, dark energy, black holes, white holes, wormhole, WARP Drive, horizon of events, theoretical physics, gravitational waves, general theory of relativity, singularity, Casimir phenomenon, theory Strings, the theory of great unions

DIY publishing house Prague

DIY Publishing. We publish handmade books made with love. Price only material, but we must love it. We will issue music in the future.