21 May 2013 | News
Eesha Khare, an 18-year-old California student, just created a supercapacitor that could recharge a cellphone battery in 30 seconds. What have you done lately? The invention won her $50,000 in the Society for Science & the Public’s huge international science fair, beating out more than 1,600 others from over 70 countries. “To improve supercapacitor energy [read more]