The Aztec Empire famously fell following the arrival of the Europeans in the 16th century. Much of what we know about the Aztecs – including their rise, the nature of the empire, and its eventual fall, comes strictly from European accounts. But what did the Aztecs themselves think? The...

For many years, depression has been treated with selective serotonin reuptake inhibitors, better known by its short form, SSRIs. Serotonin, of course, lies at the core of these medications, with the long-held belief that serotonin levels are lower in patients who suffer from depression. But how...