It was the late astronomer and author Carl Sagan who popularized the phrase “extraordinary claims require extraordinary evidence,” and originated the closely related concept of scientific skepticism. In the case discussed here, skeptics we should be. Last week we saw a flurry of media articles with headlines suggesting that exposure to the common chemical bisphenol A (BPA) increases the risk of miscarriage. Considering how much research has been conducted on BPA already, in particular extensive research on laboratory animals that examined the potential for BPA to cause any effect on reproduction, that’s a rather extraordinary claim that has not been corroborated or replicated. Read more at Science 2.0.