Phase-change materials change from one state to another (such as from a solid to a liquid) when exposed to heat, absorbing some of that heat and storing it as energy in the process. As they cool ...

Chocolate peanut butter cups are ridiculously delicious—and you can make your own fresh Reese's Peanut Butter Cups-like version with just some aluminum foil, hot water, and a mug.

He started building it in 2016 and took about 156 hours to finish. The cup video entitled: 'Round or Square? Amazing Magic Golden Mug illusion by Tony Fisher,' has racked up 2,230 views.

Enter the self-stirring coffee mug. Once you've poured coffee and milk into the mug, all you need to do is press a button. Then, the mug will automatically swirl the liquids.