Now scientists have found "comfort" eating really does work at a molecular level to lift our mood, which could explain why so many people spiral into obesity when facing stressful situations.

The complex is called the Vela Molecular Cloud Ridge, and may form part of the edge of the Orion spiral arm spur in the Milky Way galaxy.

The molecular structure of cholesteric liquid crystals is spiral, and its pitch can be modified reversibly by heat or cool, irradiation, and electric field.