" ... it was all ridges and furrows; the balls were live hedgehogs, the mallets live flamingos, and the soldiers had to double themselves up and to stand on their hands and feet, to make the arches."
The palms of his hands looked like someone had carved into leather with knives, and the wrinkles in his face were so deep that when he exerted himself the sweat was channeled through them down to his chest.
Because they are a species that likes to remain hidden in the wild, they choose to live in places with slopes and gullies, where they can easily conceal themselves.
What you see when you glance at this environment are a bunch of what appear to be tunnels or mounds here, and these are made by the gases produced by the microbes living in this mudflat area.
It's not clear what the origin of those grooves is, but it may be related to stress and strain on the surface caused by the tides from the other large moons as they orbit Jupiter and pass each other.
It's like a V-shaped trench. I'm imagining like there's a ball bearing, and it's like, and it can only go forward in that trench or back. And it goes forward. - Right.