Curious Kids^[1] is a series for children of all ages. If you have a question you’d like an expert to answer, send it to This email address is being protected from spambots. You need JavaScript enabled to view it.^[2]. “How come you feel pain when you fall and get a scrape?” – Tillman, age 9, Asheville, North Carolina Nobody likes to feel pain, but it’s something every person will experience at some point in their life. But why is that?I am a neuroscientist^[3], and my