For a scenic view, and an answer-page for Guess The World...
There
was nothing moving in sight on the fairly level plane, spawled off by
Jupiter's fierce heat when the System was young, whose horizon was a
scant mile away. So they started walking. Gravitation was surprisingly
strong, indicating unusual density. This fact, plus the intense cold
which slows down the dance of the atoms, accounted for the fact that
Five still retained remnants of an atmosphere.
The
hikers even saw traces of water vapor, in form of frost. Occasionally
they passed clumps of mossy or lichenous growth. Twice they observed
colonies of slug-like creatures growing, reproducing, and dying with
amazing rapidity...
Arthur K Barnes, Interplanetary Huntress (1956)