They compared prices at Whole Foods stores in half a dozen cities to those at various competing supermarkets to determine which stores were cheaper. They found that Whole Foods is about 15% more expensive than other conventional supermarkets, such as Kroger, Wegmans, and Safeway.
A type of igneous rock. Basalt is the most common rock type in the earth's crust and makes up most of the ocean floor.
The youngest rock in the oceans is found at mid-ocean ridges, where they are formed continually - the oceanic crust. The oldest oceanic crust rocks in the oceans are found in the trenches. They are typically 200 million years old. The oldest one is 280 millions years, in the Mediterranean Sea. Why?