Syracuse University scientists wanted to study the odd combination of ice and lava up-close. So they poured over 600 pounds of molten lava on this ice bed. What they discovered may surprise you. The lava didn’t melt the ice. In fact, lava can travel on top of snow. It can even flow underneath ice layers. Here’s why: Volcanic ash prevented the lava from melting the ice rapidly. The lava was also lubricated by a layer of steam.