Why Is There So Much Oil in the Arctic?

Editor’s note: Live Science posted the above-titled article by Emma Bryce.  It reds in part as follows:

“In 2007, two Russian submarines plunged down 2.5 miles (4 kilometers) into the Arctic Ocean and planted a national flag onto a piece of continental shelf known as the Lomonosov Ridge. Rising from the center of the Arctic Basin, the flag sent a clear message to the surrounding nations: Russia had just laid claim to the vast oil and gas reserves contained in this underwater turf.