Radium Watch Dials And Radium Girls: Who Would Have Thought ‘Eating’ Radioactive Material Was Deadly?

One of the last of the so-called Radium Girls passed away at the age of 107 in late 2014. These were women working in factories tasked with painting the numerals and other markings on watch dials with a luminous paint comprising glue, water, and radium powder. Little did they know the consequences this job would have.

El Castillo at Chichen Itza

The World’s Biggest Man-Made Calendar: El Castillo At Chichén Itzá

Contemplating the 30-meter-high ancient pyramid at Mayan archeological site Chichén Itzá in the blazing Yucatán sunlight, I was awestruck by the structure’s complexity. Not just because of the pure historical ramifications of the pyramid and temple , but also because of its timekeeping capabilities. Chichén Itzá’s most famous structure was actually built to be the world’s largest calendar And this at a time when calendars didn’t even exist!