Living Archeology. For matters of demonstration this bunch of hay has been inflamed with stone (firestone) and steel (fire steel) in the museum for primeval history in the Castle of Asparn an der Zaya, Lower Austria.
<a href="//commons.wikimedia.org/wiki/User:Wald1siedel" title="User:Wald1siedel">Wald1siedel</a>
<span class="int-own-work" lang="en">Own work</span>