Wal-Mart's answer to Aldi and Amazon: 'designer' cantaloupe

Offseason cantaloupes, Wal-Mart executives say, "taste like a piece of wood." Which is why the retail giant set out to create a "designer" melon that tastes as sweet and flavorful in winter as it does in summer. The Sweet Spark, as it is called, has been in the works for two years and is up to...

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