this quintessential, Type 1 DC is about Depth - a dimension so often ignored...

based on Type 0 from 1990s this image has been updated and expanded.

our lives are so often flat, dedicated to keeping afloat or crawling along. yet - there are many ways to explore the Depth dimension - probing, falling, sliding, sinking... my preferred one is Diving, which implies possibility of a speedy return.
but - upon reaching the bottom i heard knocking from underneath, says one Polish writer - all is relative.
have a nice day, Visitor!