Distribution of Elevations
Download a grid of elevations for the whole world. Use an equal-area projection to distribute the data uniformly in area over the Earth's surface.
The distribution has two modes, one just above sea level (zero elevation) and another corresponding to the seabed, extending from 
to 
meters.
The corresponding distribution of elevations for Mars is also strongly bimodal, with peaks at approximately 
meters and 
meters.
However, the distribution of elevations for the Moon is unimodal.
