Sensitive development : complexity creates vulnerability -- Toxic invasion : the placenta is not a protective armor -- Invisible lead : health hazards from demanding scientific proof -- Poisoned science : mercury damaged the child's brain but did not harm the mother -- Substituted milk : poisoning during infancy causes permanent brain damage -- Persistent problems : chemicals resistant to break-down can break brain cells -- Unusual suspects : chemicals that protect the lawn may damage the brain -- Mindless costs : losses suffered by victims and society from chemical brain drain -- Inconvenient truths : vested interests can endanger brain development -- Brainy choices : how to secure optimal brain development for the next generation.