the.com/nautilus
a living fossil hoarding 500 million years of design notes nobody asked it to update
old timerSurvived essentially unchanged for 500 million years
jet propulsionSwims by squirting water like a slow torpedo
perfect spiralShell chambers follow a logarithmic growth curve
deep diverCrushed if it descends below 800 meters
many armsHas up to 90 tentacles, none with suckers