Skip directly to: Navigation for this section | Main page content

About the CLIMB logo

tree of lifetree of life

top: image courtesy of the Smithsonian Instition

The CLIMB logo depicts a cross-section of a tropical mollusc, the chambered nautilus (Nautilus pompilus). The internal chambers within the shell are arranged in a logarithmic spiral, which means that for a given rotation angle, the distance from the origin of the spiral to the curve increases by a constant factor. Expressed another way, the logarithm of the ratio of the radius (r) to this constant (a) yields the rotation angle (θ).