Question. Is there a science that explains miraculous activities like assuming a gigantic form, multiplying into many forms etc.?
Answer by Romapada Swami:
There are different yogic siddhis, which may be attained by practice of yoga, such as Patanjali’s yoga system. They work on the principle of manipulating subtle matter, such as by sound vibration (chanting of mantras), just as modern science manipulates gross matter. Specifically, there are eight mystic perfections such as mahima (assuming giant form), anima (becoming smaller than the smallest), prapti (attaining whatever one desires) etc.
These mystic capacities are derived from the Supersoul.
