![Image: Cecilia Dougherty, drawing based on 40,000-year-old red ochre hand stencil at El Castillo cave complex, Puente Viesgo, Spain. [A white outline of a hand with white shading around it is centered in the foreground of a distant, black starry sky.]](https://www.ceciliadougherty.com/wp-content/uploads/2024/04/Hand-stencil.png)
Image: Cecilia Dougherty, drawing based on 40,000-year-old red ochre hand stencil at El Castillo cave complex, Puente Viesgo, Spain. [A white outline of a hand with white shading around it is centered in the foreground of a distant, black starry sky.]