Marketplace: Stacey Vanek-Smith: Oil is still 65 percent more expensive than it was last year. So its slight dip of late hasn’t curbed the enthusiasm for drilling. Especially in relatively untapped places, like the Arctic. It’s expected to become increasingly important as polar ice melts. British scientists unveil a new map of the region today. From North Carolina Public Radio, Janet Babin reports. Janet Babin: The Arctic land grab started to heat up last year, when Russia planted a flag on the …