Tag: sun
What are the health supplements of vitamin D?
A nutritional issue related to physical health is about “How many ways are there to supplement vitamin D?”
Who is the first person in the world to propose that moonlight comes from the reflection of sunlight?
A question related to earth sciences and cosmic astronomy today is “Who is the person who first proposed in the history of the world that the moon’s lunar system comes from the sunlight (also known as sunlight) reflected from the sun?”
