Chloe Stone is the Science Nerds' anatomy expert. She is 10 years old. She is like a doctor who knows all about our bodies inside and out. She's caring and always ready to help her friends. Her twin is Max, another Science Nerd. The other Science Nerds - Tim, Juli, Electro and Astra - are also her friends. So is Gizmo the robot. Chloe is also a girly girl who likes girls' things. She has an imaginary friend called the Nerb.