What is happening to the neurochemistry of an addict's brain that makes that person so unable to do without cocaine, heroin, or methamphetamines?
"You can turn your back on a person, but never turn your back on a drug, especially when it's waving a razor sharp hunting knife in your eye," wrote gonzo journalist Hunter S. Thompson, no stranger himself to the compelling nature of addiction.
We all think we know what it means to be conscious, but it is hard to pin this down in a precise, scientific way—as USC neuroscientist Antonio Damasio explains in our video. Every weekday in September, Big Think will offer a new insight into the human brain in our new "Going Mental" blog.
What does it mean to be conscious? It's a question that philosophers and scientists have puzzled over perhaps since there have been philosophers and scientists.
It's been over 20 years since the Berlin Wall fell, yet the North Atlantic Treaty Alliance (NATO), a military group which was originally created to defend Western Europe from Russia, continues to exist, with 28 member states pledged to collectively defend one another in the face of outside aggression.