Skipped your morning coffee, and feeling the effects? We all know the feeling of caffeine withdrawal: the thumping headache, intense irritability, and inability to focus for more than 30 seconds on any one thing.

THE SCIENCE BEHIND CAFFEINE WITHDRAWAL

But why does it have this physical impact on us? What does caffeine actually do to our brain? And do our brains adapt to caffeine?

Watch as Hank Green of SciShow answers all these questions in just 180 seconds.

https://www.youtube.com/watch?v=zGWZqpHcajY