Why does Emily deschanel look different in season of bones?

Emily Deschanel may appear different in various seasons of "Bones" due to factors such as changes in hairstyle, makeup, and wardrobe choices that evolve over time. Additionally, natural aging and physical changes can influence her appearance. Weight fluctuations or health-related factors might also play a role. Overall, these elements contribute to the visual evolution of her character, Dr. Temperance Brennan, throughout the series.