Cryptochromes are a type of protein found in many living organisms, including plants and animals. They play a crucial role in sensing light and regulating biological rhythms, such as the circadian rhythm. These proteins absorb blue light and help organisms adapt to changes in their environment, influencing processes like growth and flowering in plants. In animals, cryptochromes are involved in various functions, including navigation. For example, some birds use cryptochromes to detect the Earth's magnetic field, aiding in their migratory patterns. This ability highlights the importance of cryptochromes in both ecological and evolutionary contexts.