(AP) -- Phil DeVore pulls a folded piece of aluminum from a murky pond. The aluminum looks like a piece of siding that's blown off a building, but DeVore knows it's much more valuable than that. He slips a rubber band off the aluminum and unfolds it. He likes what he sees -- 50 or 60 glistening black leeches. They're your common ribbon leeches, Nephelopsis obscura to aquatic biologists.
After its initial use, cooking oil can be refrigerated or frozen and reused for another six hours of cooking (see References 2). Don't reuse cooking oil if it smells rancid or you can't heat it without smoke developing, as this indicates significant deterioration (see References 1 and 4).
1 Palm oil can last for several months. 2  Peanut oil (refined) will last for two years. 3  Vegetable oil can last for a year or longer as long as it is tightly covered.  Olive oil may be kept in the cupboard (at temperatures between 57Â°F and 70ÂºF (14Â°C and 21ÂºC) for up to 15 months.