Karrer (Moon)

Named after Paul Karrer - Russian/Swiss biochemist; Nobel laureate (1889-1971).

Karrer is a lunar impact crater that is located in the southern hemisphere on the far side. It lies to the northeast of the crater Minkowski, and south of Leavitt. The most notable feature of this crater is the dark-hued floor, created when the interior was resurfaced by lava flows that had a lower albedo than the surrounding terrain. The outer rim is nearly circular, but broken in the northeast by a smaller overlapping crater. (wikipedia entry)

A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.