When you injure yourself, you may reach for a hot or a cold pack. Which option is better depends on the nature of your pain, what caused it and how long you've had it. Heat therapy, sometimes called ...

A reusable hot pack made of a supersaturated sodium acetate solution that crystallizes spontaneously once triggered by a metal piece releases heat. A balloon filled with hydrogen gas also releases ...

Cold weather: You either love or hate it. For those who enjoy snow-based activities like skiing and snowboarding, it can be a fun time of year. On the other hand, you may have much different feelings ...