Scientists in Sweden have created a liquid that can absorb solar energy and store it as a thermal fuel for as long as 18 years. The fluid works like a rechargeable battery, but instead of electricity, sunlight goes in and heat comes out when it's needed. https://t.co/sM5PPSQ2ga pic.twitter.com/7bxbvuF3wb

— CNN (@CNN) November 24, 2019