#maya-civilization

#maya-civilization

Leonardo da Vinci's visionary designs for flying machines were inspired by birds and laid a foundational understanding of aerodynamics, influencing future aviation developments.

"The discovery of mercury in the soil and reservoirs was expected, but the extent of it was a surprise," says Jean Tremblay. "What is particular to our study is that we systematically detected mercury throughout the city core (near both elite and non-elite residential zones) and through the entire occupation history of the site. Everyone was exposed to mercury, regardless of social status."

Harrison-Buck and her colleagues calculated that at its peak, the system could have produced enough fish each year to feed around 15,000 people.