A University of Calgary study found that both Bisphenol A, a chemical used to make household plastics and epoxy resins, and Bisphenol S (BPS), which is often labelled as "BPA-free" and presumed to be safer, cause alterations in brain development that can lead to hyperactivity in zebrafish (an animal model widely used to help understand fetal brain development). "I was actually very surprised at our results. This was a very, very, very low dose, at levels found in the Bow and