You can donate using MasterCard, it does say paypal on the buycraft website but when you are redirected to the paypal website you have the choice of a credit card, mastercard included.
Its a situation involving quantum physics. Schrödinger's cat: a cat, a flask of poison, and a radioactive source are placed in a sealed box. If an internal monitor detects radioactivity (i.e. a single atom decaying), the flask is shattered, releasing the poison that kills the cat. The Copenhagen interpretation of quantum mechanics implies that after a while, the cat is simultaneously alive and dead. Yet, when one looks in the box, one sees the cat either aliveor dead, not both alive and dead. This poses the question of when exactly quantum superposition ends and reality collapses into one possibility or the other. Totes not copied from wikipedia.
