Most Recent Posts
Why Does the Ocean Look Blue?
Why Does the Ocean Look Blue? The ocean usually appears to be blue. However, sea water, as anyone knows who has splashed about in…
What Causes the Colors of Autumn Leaves?
What Causes the Colors of Autumn Leaves? Leaves contain a variety of colors - green, orange, yellow, and brown. But during the spring and…
What Gives Yellow Mustard Its Bright Coloring?
What Gives Yellow Mustard Its Bright Coloring? Bright yellow mustard you're familiar with starts out as tiny seeds that are white, brown, or
What Is Chalk?
Chalk is a soft, white limestone. The chemical composition is calcium carbonate with minor amounts of silt and clay. It was formed from the
When Were Buttons First Used?
Nobody knows when buttons were first used, or by whom. Museums have in their collections bone buttons older than written history. The Greeks