One interesting botanical fact at a time.
Sunflowers and many other young plants track the sun across the sky from east to west—but how do they do it without eyes? Plants possess special light-detecting proteins called
phototropins. When these proteins sense the morning light, they send hormones to the shaded side of the stem, causing those cells to stretch out and physically bend the plant toward the sun.
Just like our bodies rely on morning sunlight to wake up and set our internal clocks, plants are biologically hardwired to always turn toward the light.