Leaves change color in the fall because the chlorophyll ... I was looking through the tree canopy lower down to see the sun beaming its rays onto a higher elevation. Since the sun is behind ...

Researchers from the University of Turku, Finland, have found a new way to protect solar cells from harmful UV radiation ...

The appropriately named "blood moon" will take on a pronounced reddish hue when the eclipse begins to emerge across the United States Thursday night.