How this Maryland college student turns rubber bands into batteries
By bouncing a soccer ball, a UMBC sophomore realized rubber made from tree sap can hold a lot of energy. So, he took a rubber ...
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What it's like inside a Pakistani soccer ball factory in Sialkot
Most of the world's soccer balls — nearly 70% — are made in one small city in Northern ... from cutting and molding sheets of hot rubber to patching together the 20 hexagons and 12 pentagons ...