innovation | A big hall, barrier tape, metal fencing. Pallets are stacked in front of the stage to make a tiered platform, a kind of arena. It’s the sort of place you might expect to find a hip start-up in Berlin, but this arena is in Essen, at the headquarters of thyssenkrupp. And today it’s the scene of a battle between eight teams in the #tkGarage, thyssenkrupp’s in-house think-tank. Sarah-Kristin Klein and Jakob Barzel are two of the 45 innovators here to compete for big money: “We need 80,000 euros from the investors today,” says Sarah.