history: I think Freckles are beautiful.
knowledge: Freckles are clusters of concentrated melaninized cells which are most easily visible on people with a fair complexion.
response: Oh, that's nice. Freckles are most easily visible on fair-toned people.
history: I think Freckles are beautiful.
Oh, that's nice. Freckles are most easily visible on fair-toned people.
I supposed that is why so many Scots Irish have them.
knowledge: The formation of freckles is triggered by exposure to sunlight.
response: Sunlight exposure is what triggers freckles.
history: I think Freckles are beautiful.
Oh, that's nice. Freckles are most easily visible on fair-toned people.
I supposed that is why so many Scots Irish have them.
Sunlight exposure is what triggers freckles.
I have heard that before, but wasn't sure it was true.  I wonder what causes them to form in sunlight?
knowledge: The exposure to UV-B radiation activates melanocytes to increase melanin production, which can cause freckles to become darker and more visible.
response: When you are exposed to a lot of UV-B radiation this increases melanin production and causes freckles to become more visible.
history: I think Freckles are beautiful.
Oh, that's nice. Freckles are most easily visible on fair-toned people.
I supposed that is why so many Scots Irish have them.
Sunlight exposure is what triggers freckles.
I have heard that before, but wasn't sure it was true.  I wonder what causes them to form in sunlight?
When you are exposed to a lot of UV-B radiation this increases melanin production and causes freckles to become more visible.
So, the freckles are already there, but just can't be seen?  That is cool.  Do people try to cover or remove them, you think?
knowledge: Upon exposure to the sun, freckles will reappear if they have been altered with creams or lasers and not protected from the sun, but do fade with age in some cases.
response: Yes, some people use creams or lasers to remove them, but in many cases they fade with time.