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Mercury

Our solar system's smallest planet will pass between the Earth and the Sun on Monday in a rare astronomical event known as a "transit" of Mercury.

It's possible to view the event, but people need to be careful.

It is the first time that the Environmental Protection Agency and Food and Drug Administration have issued recommendations on the minimum amount of fish that pregnant women and children should eat. The previous advisory, issued in 2004, included only maximum amounts to protect their fetuses and young children from mercury, which can harm developing brains and reduce IQs. “Eating fish with lower levels of mercury provides numerous health and dietary benefits,” Nancy Stoner, the EPA's acting assistant administrator for the Office of Water, said in a statement. “This updated advice will help pregnant women and mothers make informed decisions about the right amount and right kinds of fish to eat during important times in their lives and their children’s lives.”