Curiosity and wonder are most basic nature of our being. We all enjoy and learn from a good science lecture. They open up our imagination and guide us to understand the world around us. In this spirit, here are two links to the public science lectures that you may enjoy. There are several lectures in each of these sites with cross-discipline talks in mathematics, physics, biology and more.
1. KITP public lectures, here
2. Perimeter public lectures, here