There are four fundamental equations that determine physics of charged substances: Maxwell equations. But why are there four? Why not just one? Why do they look so complicated? This class will solve such questions! In this class, we will first go through the physical meaning of Maxwell equations, then introduce mathematical concept of differentials, and finally write Maxwell equations in terms of electromagnetic field.

From the nitrogen cycle to the Three Gorges dam to the electric arc steel furnace, this physics-based class examines how we're screwing up the planet - and how we might be able to save it.

A survey of how batteries work with a particular focus on how the modern batteries in your phones, laptops and electric vehicles work.

Human-caused climate change will impact every continent and ocean throughout the rest of this century -- and likely beyond. How do human-made emissions lead to climate change? How will climate change affect people's lives here and around the world? And what technologies and policies might we use to limit the damage?

Curious how climate change actually works? Want to learn why throwing an apple core in the trash is worse than throwing it under a bush, but better than throwing it in a creek? Ever wonder why acid rain is a problem in New England but not Texas? Come to this three-hour rapid-fire lecture and have all your sustainability science questions answered!