A decade after scientists discovered that lab rats will rescue a fellow rat in distress, but not a rat they consider an outsider, new UC Berkeley research pinpoints the brain regions that drive rats to prioritize their nearest and dearest in times of crisis. It also suggests humans may share the same neural bias.
A new book entitled “What, if Anything, are Species?” by IB Professor Brent Mishler explores this controversial topic in detail, based on 40 years of investigation. He concludes that species are nothing special; entities currently given that rank are simply clades like taxa at all other levels on the tree of life, smaller or larger than the traditional species level. He goes into the advantages of fully rankless classification, and of a multi-level approach to ecology and evolution.