About Chaos (or why you should carry an umbrella with you tomorrow) | by Oscar Garcia Montero | Many Body Physics | Medium

It is an amazing, yet often overlooked, feeling to go out of your house, fully clad in summer clothes, look up to a blue sky and a bright sun and knowing it will be like that all day. That a storm will not suddenly pop up and ruin your grilling and make you walk soaked to your house, right? Well, we owe that nice feeling to the countless meteorologists that devote their lives to studying the weather and also try to apply that science to everyone’s everyday life. This is a fundamental property of any scientific theory: prediction. Or in weather-like slang, forecast. But how is this forecast done, and how is it related to many body physics? The connection is in fact quite straightforward. The atmosphere is basically made out of air, other gases and water, which are all fluids. This makes the whole system also a fluid. A very complicated fluid, that’s for sure, but a fluid anyway, and therefore, ruled by the laws of Classical (as in not quantum) Fluid Dynamics (1). If now you are probably

It is an amazing, yet often overlooked, feeling to go out of your house, fully clad in summer clothes, look up to a blue sky and a bright sun and knowing it will be like that all day. That a storm will not suddenly pop up and ruin your grilling and make you walk soaked to your house, right? Well, we owe that nice feeling to the countless meteorologists that devote their lives to studying the weather and also try to apply that science to everyone’s everyday life. This is a fundamental property of any scientific theory: prediction. Or in weather-like slang, forecast. But how is this forecast don