<iframe width="580" height="385" src="https://www.youtube.com/embed/5BIL8UQIeFA" frameborder="0" allowfullscreen></iframe> <br>Simply because the steam engine triggered the primary industrial revolution within the 18th and 19th century, and the interior combustion engine, together with the event of ... <br><a href="https://www.youtube.com/watch?v=5BIL8UQIeFA">source</a>