In the midst of our daily binge of emailing, Tweeting, Facebooking, app downloading and photoshopping it’s almost hard to imagine how anything was done without the help of a computer. For Venezuelan artist Rafael Araujo, it’s a time he relishes. At a technology-free drafting table he deftly renders the motion and subtle mathematical brilliance of nature with a pencil, ruler and protractor. Araujo creates complex fields of three dimensional space where butterflies take flight and the logarithmic spirals of shells swirl into existence. He calls the series of work Calculation, and many of his drawings seem to channel the look and feel of illustrations found in Da Vinci’s sketchbooks.