2,500 years ago, the writing of history as we know it didn’t exist. The past was recorded as a list of events, with little explanation for their causes beyond accepting things as the will of the gods. Herodotus wanted a deeper understanding, so he took a new approach: looking at events from both sides to understand the reasons for them. Mark Robinson explains how “history” came into being.
What causes addiction? Easy, right? Drugs cause addiction. But maybe it is not that simple.
When many individual organisms come together and move as one entity, that’s a swarm. From a handful of birds to billions of insects, swarms can be almost any size. They have no leader, and members interact only with their neighbors or through indirect cues. Members follow simple rules: travel in the same direction as those around you, stay close and avoid collisions. Maria R. D’Orsogna shares why.
In theory, we’re nowadays allowed to get together with pretty much anyone we like. And yet, at a psychological level, we aren’t free to love just any suitable person. We have a type – and strangely and awkwardly, these types are often not those who stand a chance of making us maximally happy.
Life on this planet is based on cells. Cells do vary in size. But they are pretty similar in their dimensions across all species. A blue whale doesn’t have bigger cells than a hummingbird, just a lot more of them.
When historians talk about the atrocities of the 20th century, we often think of those that took place during and between the two World Wars. But two months before the Rape of Nanking in China, and a year before Kristallnacht in Germany, a horrific ethnic cleansing campaign occurred on an island between the Atlantic Ocean and Caribbean Sea. Edward Paulino details the 1937 Haitian Massacre.