I find this one interesting,
Crop Circle At Four Mile Clump, Nr Ogbourne Down, Wiltshire. Reported 29th July
And it appears to be the Vitamin A Molecule,
Here are some interesting facts about Vitamin A (Retinol)
"Vitamin A is the name of a group of fat-soluble retinoids, including retinol, retinal, retinoic acid, and retinyl esters [1-3]. Vitamin A is involved in immune function, vision, reproduction, and cellular communication [1,4,5]. Vitamin A is critical for vision as an essential component of rhodopsin, a protein that absorbs light in the retinal receptors, and because it supports the normal differentiation and functioning of the conjunctival membranes and cornea [2-4]. Vitamin A also supports cell growth and differentiation, playing a critical role in the normal formation and maintenance of the heart, lungs, kidneys, and other organs ."