In cosmology, a texture is a type of topological defect in the order parameter (typically a scalar field) of a field theory featuring spontaneous symmetry breaking. They are not as localized as the other defects, and are unstable. No textures have been definitively confirmed as having been detected, but their existence is compatible with current theories and observations of the universe.
A 2012 study found no evidence of "knots" in space.
- Cruz, M.; N. Turok; P. Vielva; E. Martínez-González; M. Hobson (2007). "A Cosmic Microwave Background Feature Consistent with a Cosmic Texture". Science 318 (5856): 1612–4. Bibcode:2007Sci...318.1612C. PMID 17962521. arXiv:0710.5737. doi:10.1126/science.1148694. Retrieved 2007-10-25.
- http://arxiv.org/abs/1203.1928 - A robust constraint on cosmic textures from the cosmic microwave background