…playful fun in dogs, play in dolphins; play in fishes, frogs and reptiles and fun & play in invertebrates.
Giant viruses, containing unique genes unlike those found in any other life (as well as genes not normally found in viruses, such as those for protein synthesis) are forcing new speculations about very early life on Earth.
I’ve passed on the usual stories about Phineas Gage, and how his famous incident changed him into a sociopath. It turns out that how his damage affected his personality is less certain than we thought.
Why do we yawn?
The short answer is that we still don’t know for sure, but here’s a pretty good (popular) summary of some current research.