natural selection
cleaned up
too dry
also too dry
a bit wetter
questionable
intervention for one time of day
cause
effect
before or after
before or after
handy rock
fingery rock
smart rocks
messy
better
movement not detected
movement detected
camo
small echo
echo disturbed
not natural
rock improvements
stack
material choices
inverse
reverse
indeterminate
determinate
ham-handed repair
suspicious rocks
past
quxl?