| Macro photograph of oil and water against a background provided by a selection of citrus fruits. Oil and water do not mix as the oil molecules have a lower density than the water molecules and so float on top of the water. | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / RICHARD BEECH PHOTOGRAPHY |
| Taille de l’image : | 7020 px × 4680 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |