Daily Junction.mobi portal<p><span><a href="https://theconversation.com/profiles/ronan-lordan-2768501">Ronan Lordan</a>, Postdoctoral Researcher in Circadian Biology, FutureNeuro Research Ireland Center & School of Pharmacy and Biomolecular Sciences, <em><a href="https://theconversation.com/institutions/rcsi-university-of-medicine-and-health-sciences-788">RCSI University of Medicine and Health Sciences</a></em></span></p>
<p>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/what-space-travel-teaches-us-about-sleep-and-circadian-rhythms-293289">original article</a>.</p> </div>