Interesting Engineering on MSN3d
Red onion waste becomes powerful solar cell shield that blocks 99.9% of UV rays
Researchers have developed a bio-based ultraviolet (UV) protection film that has the potential to replace conventional ...
The tradition of dyeing Chicago’s river green for St. Patrick’s Day
Discover the past of Chicago's emerald waters and the festivities that capture the spirit of St. Patrick's Day.
New Atlas3d
Onion-skin dye may find use in greener UV-protected solar cells
Solar cells are subjected to a lot of harmful ultraviolet light, as they're typically placed for maximum sunlight exposure. A ...
NPR3y
Dyeing the Chicago River green is a St. Patrick's Day tradition. How did it start?
In 1962, Chicago city workers dumped 100 pounds of dye into the river flowing through downtown Chicago. It left the river emerald green for an entire week and kick-started an annual tradition.