User blog comment:Affectos/Origin Challenge/@comment-24509764-20150302023526/@comment-24509764-20150305144701

Maybe something from the Evangelos Florakis Naval Base explosion in Cyprus? Explosives were left for two and a half years in the sun when they self detonated. The piece of wood was found in the desert; maybe it collected and concentrated the sun's thermal energy until it exploded.