The New York Times
Perspective and Leonardo’s “Perspectograph”
Filippo Brunelleschi's invention of linear perspective during the Renaissance was further developed by his apprentice, a young artist named Leonardo da Vinci. Now modern artists can give da Vinci's famous perspectograph a try with a...
Curated OER
Air Pollution in Mexico City
A fantastic lesson on urban air pollution problems throughout the world is here for you. Learners understand that there are many factors involved in creating pollution, that there are many health effects brought on by air pollution, and...