  In the paper "Life, the Universe, and everything--42 fundamental questions",
Roland Allen and Suzy Lidstr\"om presented personal selection of the
fundamental questions. Here, based on the condensed matter experience, we
suggest the answers to some questions concerning the vacuum energy, black hole
entropy and the origin of gravity. In condensed matter we know both the
many-body phenomena emerging on the macroscopic level and the microscopic
(atomic) physics, which generates this emergence. It appears that the same
macroscopic phenomenon may be generated by essentially different microscopic
backgrounds. This points to various possible directions in study of the deep
quantum vacuum of our Universe.
