Although conflict is an intrinsic part of human nature, war has not always existed. War requires a type of organisation that not all societies across history have been able to adopt, including the creation of institutionalised armies, the legitimisation of violence, and its development during a limited period of time. It is therefore an archaeological challenge to determine when exactly humans “invented” structured combat.

First studies conducted on skeletal remains found at the necropolis of San Juan ante Portam Latinam in Laguardia (Álava, Spain) in 1985 already documented that there were traces of violence at the site. These remains were dated to about 3200 BC.

New research has revised the previous conclusions. The results go even further and conclude that this is the oldest European site where a large-scale, organised and long-lasting conflict has been clearly documented. In other words, the first documented example of warfare on the continent has been found, almost two millennia earlier than previously assumed.

Installing giant solar farms in one part of the world could affect the climate in another. Because solar energy is limitless, we generally think that by harnessing it, we are not affecting anyone else, but that may only be true to a certain scale. Put up enough solar panels in the Sahara for example, and you could make it cloudier in Europe, making it harder for people to make the most of their own panels.

Artificial intelligence is trying to eliminate accents. It means well - trying to avoid the social effects of accent discrimination. However, this intention raises the questions of what is considered to be a “non-accent” and what is, after all, wrong with having an accent.