I often find myself wondering about various things I see every day. One question I’ve had is: why do stars twinkle? I learned that the twinkling is caused by the Earth's atmosphere. As starlight passes through different layers of air with varying temperatures and densities, it bends or refracts, causing the star’s light to shift and flicker. Another question I’ve had is why our fingers wrinkle in water. The answer lies in our nervous system’s response, which helps us grip objects better under wet conditions. Asking such questions and finding scientific explanations is the first step in becoming a curious thinker or even a scientist.