REVEALED: Why do planes have tiny HOLES in their windows? places PASSENGERS will notice tiny holes in every window on a plane - but what purpose do they serve? Share: Email ThisBlogThis!Share to XShare to Facebook Related Posts:ECO-TRAVEL: What is it and the top 'green' destinations to go toChannel 4 Supershoppers: Why booking hotels online does NOT guarantee the cheapest priceREVEALED: THESE are the cheapest places in Europe to do your Christmas shoppingREVEALED: THESE are the cheapest places in Europe to do your Christmas shoppingECO-TRAVEL: What is it and the top 'green' destinations to go to