While people were gazing upward to witness Monday’s spectacular solar eclipse, shadows on the ground were just as fascinating. Some of them even looked like crescents.

According to World Book, in the minute or two before and after the sun is totally blocked, people may notice thin stripes of dark and light shadows moving rapidly, as if in waves.

They are called shadow bands or snake bands. Scientists are unsure what causes it, but it is the same phenomenon that causes stars to twinkle, World Book reported.

About the Author

Keep Reading

Gov. Brian Kemp announces his 2025 proposal to overhaul Georgia's litigation laws. (Jason Getz / AJC)

Credit: Jason Getz / Jason.Getz@ajc.com

Featured

Sam Lilley, the late first officer of the fatal American Airlines flight, was a Richmond Hill, Ga. native. His father Tim Lilley posted this image of Sam on Facebook Thursday in remembrance. (Photo via Facebook)

Credit: Tim Lilley