What’s the cloud of gas exploding in the air? Turns out it’s what happens when you combine boiling water with liquid nitrogen. NIST researcher Angie Hight Walker demonstrates a radically cool experiment of “making thunder” by quickly adding the boiling water, which can be considered lightning, to the very cold liquid nitrogen (having a temperature of -196 C or 77 K) simulating the atmosphere. The whole process makes a beautiful cloud of water vapor. The cold nitrogen cools the air around it. Jus

GAS EXPLOSION PREVENTION | PROTECT YOUR FAMILY: After several recent reports of gas explosions across the state, Insurance Commissioner and State Fire Marshal Mike Causey offers simple gas line safety steps to protect your home and family and potentially save your life. | NC OSFM