39.5 MB (2.9 MB compressed)
4248 x 3251 pixels
36.1 x 27.4 cm ⏐ 14.2 x 10.8 in (300dpi)
CLAUDE NURIDSANY & MARIE PERENNOU / SCIENCE PHOTO LIBRARY CLAUDE NURIDSANY & MARIE PERENNOU / SCIENCE PHOTO LIBRARY
Macrophotograph of a snow crystal showing characteristic hexagonal symmetry. Each crystal is made up from water molecules, arranged with 2 hydrogen atoms making an angle of 105 degrees with 1 oxygen atom. The fixed shape of the water molecule means they can assume a stable crystal arrangement only when arranged as a 6-branched figure. Despite essential hexagonal similarity no two snowflakes are identical because their growth from cloud, through sky, to the ground is influenced by temperature, humidity, air currents etc. Mag: x5 at 35mm, x9 at 6x4. 5 size.
Model release not required. Property release not required.