Answer:

bigbang

Answer	Crossword Clue
BIGBANG	Bone-rattling part of the 1812 Overture?
BIGBANG	Original noise?
BIGBANG	Creation alternative

BIGBANG	Theory of the beginning
BIGBANG	Cosmic explosion
BIGBANG	One theory of the beginning of the universe.
BIGBANG	Origin of the universe, perhaps
BIGBANG	Start of everything
BIGBANG	How it all started, it's thought
BIGBANG	Beginning of time?
BIGBANG	Universal theory

BIGBANG	Beginning of the universe