The Thermavault refrigeration unit can keep vaccines cool with a reusable salt solution. The teens who built it plan to test ...

Because salt molecules dissolve in water, the charged ions that make up the salt molecules break apart, taking up heat from ...

When you buy through our links, Business Insider may earn an affiliate commission. Learn more A mini fridge is a convenient addition to your dorm, home office, garage, or anywhere else you care to ...