Bubbles are usually the first sign that water’s coming to the boil, but heating it in a microwave seems to skip this important step. Here’s what’s going on. When you purchase through links on our site ...

* Water heated in a microwave may become superheated and erupt unexpectedly when disturbed * Microwaving can change water's physical properties (refractive index, surface tension) beyond what ...

When you're waiting for a pot of water to heat up on the stove, tiny bubbles are the first sign it's getting ready to boil. As the water gets hotter, the bubbles get bigger, until a rolling boil ...