1.0Gizmodo Australiahttps://gizmodo.com.auGizmodo Internationalhttps://gizmodo.com.au/author/gizmodointernational/rich600338<blockquote class="wp-embedded-content" data-secret="iflV3w7L54"><a href="https://gizmodo.com.au/2013/09/a-railroad-mounted-printer-that-covers-its-tracks-in-laser-graffiti/">Railroad-Mounted ‘Printer’ Covers Its Tracks In Laser Graffiti</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://gizmodo.com.au/2013/09/a-railroad-mounted-printer-that-covers-its-tracks-in-laser-graffiti/embed/#?secret=iflV3w7L54" width="600" height="338" title="“Railroad-Mounted ‘Printer’ Covers Its Tracks In Laser Graffiti” — Gizmodo Australia" data-secret="iflV3w7L54" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); </script> https://gizmodo.com.au/wp-content/uploads/2013/09/14/19024jegtpt2npng.png?quality=751098619People who live in San Francisco may have seem some otherworldly lights radiating from the train tracks near their houses earlier this year. It was the latest project of Aaron Koblin, the Creative Director of Google’s Data Arts Team, and director Ben Tricklebank.