What are cryptochromes?

Cryptochromes are special molecules that help some animals tell time, like a little clock inside their bodies.

Imagine you have a toy watch that tells you when it's morning or night, just by looking at the light. That’s kind of what cryptochromes do for birds and other creatures. They’re found in parts of the body where light can reach, like the eyes, especially in places called the retina, which is like a special blanket that catches light.

Cryptochromes change when they see blue light, the kind you might see from a sunny sky or even a blue lamp. When this happens, it sends signals to the brain saying “It’s time to wake up” or “Time to sleep.” It's like having a little helper that checks the sky and tells your body what to do next.

Some animals use these helpers to know when to fly south for winter or when to start singing in the morning. They're not magic, they’re just really smart clocks made of molecules! Cryptochromes are special molecules that help some animals tell time, like a little clock inside their bodies.

Imagine you have a toy watch that tells you when it's morning or night, just by looking at the light. That’s kind of what cryptochromes do for birds and other creatures. They’re found in parts of the body where light can reach, like the eyes, especially in places called the retina, which is like a special blanket that catches light.