Attention, chocolate lovers: You may not be able to help yourselves. Swiss and British scientists have linked the widespread love of chocolate to a chemical "signature" that may be programmed into our metabolic systems.
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In most cases, it's fairly easy to diagnose a burn. It can be hard to tell the difference between degrees of burn, though. For example, it may take a day or two for the burn to blister, making it a second-degree burn.