<blockquote class="twitter-tweet" data-lang="en"><p lang="en" dir="ltr">This is how the heart works <a href="https://t.co/IvhzfgpaDd">pic.twitter.com/IvhzfgpaDd</a></p>— How Things Work (@ThingsWork) <a href="https://twitter.com/ThingsWork/status/751532697810599938">July 8, 2016</a></blockquote> <script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>