When a chemical reaction occurs, energy is transferred to or from the surroundings. There is usually a temperature change. For example, when a bonfire burns it transfers heat energy to the ...

A new ‘self-cooling’ can could change picnics, camping trips and days out at the beach forever - and help save the planet ...

The good news is that severe reactions to novocaine and other local anesthetics (including the more commonly used lidocaine) are uncommon. When symptoms do occur, they can range from minor swelling to ...