<a href="https://cdn.zmescience.com/wp-content/uploads/2014/08/tyZyRKD.jpg"><img class="aligncenter wp-image-29948" src="https://cdn.zmescience.com/wp-content/uploads/2014/08/tyZyRKD-1024x769.jpg" alt="" width="590" height="443" /></a> When you think about it, they weren't really that far off from what we are doing today, which you can see below. However, some key elements are indeed different - can you spot them? <a href="https://cdn.zmescience.com/wp-content/uploads/2014/08/GWKfflL.jpg"><img class="aligncenter wp-image-29949" src="https://cdn.zmescience.com/wp-content/uploads/2014/08/GWKfflL.jpg" alt="" width="590" height="443" /></a>