Volcanoes rumble, smoke, light up the sky with incandescent projections and explode. Their activity can be as spectacular as it is dangerous. Volcanologists have come close to them for their scientific research. Haroun Tazieff, Katia and Maurice Krafft were the most famous among them. This bubbling lecture will take you up in the air with clouds of ash, down the slopes with lava flows, and into the mysterious belly of volcanoes to find out what's lurking there!