Page "Cosmological constant" Paragraph 22

More recent work has suggested the problem may be indirect evidence of a cyclic universe possibly as allowed by string theory.

With every cycle of the universe ( Big Bang then eventually a Big Crunch ) taking about a trillion ( 10 < sup > 12 </ sup >) years, " the amount of matter and radiation in the universe is reset, but the cosmological constant is not.

Instead, the cosmological constant gradually diminishes over many cycles to the small value observed today.

" Critics respond that, as the authors acknowledge in their paper, the model “ entails ... the same degree of tuning required in any cosmological model ...”.