Precise solar observations fed millions in ancient Mexico
Without clocks or modern tools, ancient Mexicans watched the sun to maintain a farming calendar that precisely tracked seasons and even adjusted for leap years.
Pollution cleanup method destroys toxic “forever chemicals”
An insidious category of carcinogenic pollutants known as “forever chemicals” may not be so permanent after all. University of California, Riverside, chemical engineering and environmental scientists recently published new methods to chemically break up these harmful substances found in drinking water into smaller compounds that are essentially harmless. The patent-pending...