This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Hydromagnesite bubbles Jewel cave. en Hydromagnesite bubbles form of moonmilk These bubbles have wall thicknesses in the vicinity of to thousandths of an inch and are known only to be found in Jewel Cave es Burbujas de hidromagnesita una forma de leche de luna Estas burbujas tienen unas paredes de un grosor de milmilsimas de pulgada