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3 teens invented a salt-powered refrigerator that doesn't need electricity. They're building 200 of them for hospitals to use.
The Thermavault refrigeration unit can keep vaccines cool with a reusable salt solution. The teens who built it plan to test ...
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The 4 best mini fridges for college dorms, offices, RVs, and more
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 ...