Saturday Citations: Hot, hot gold; mechanisms of face recognition; first pathway of gut-brain communication

It's Saturday! Let's review the last seven days of research findings: In a kind of logistics/transport breakthrough, archaeologists in Wales have determined that smaller megaliths surrounding Stonehenge were transported by Neolithic humans rather than glaciers, as some researchers have proposed in the past. Harvard scientists created cell-like chemical systems that simulate metabolism, reproduction and evolution, demonstrating that self-created systems can arise in non-biochemical molecules. And like humans, octopuses are susceptible to the "rubber hand" illusion.