People across Europe were pretty confused last night, after a giant blue swirl appeared in the sky, lasting several minutes.

How chemistry and force etch mysterious spiral patterns on solid surfaces. ScienceDaily . Retrieved March 28, 2025 from www.sciencedaily.com / releases / 2025 / 03 / 250313180501.htm ...

On a whim, she looked at the dots under a microscope and couldn't believe her eyes. Beautiful spiral patterns had been etched into the germanium surface by a chemical reaction. Wong's curiosity ...