Into brains of newborn mice, researchers implanted human "progenitor cells." These mature into a type of brain cell called astrocytes (see below). They grew into human astrocytes, crowding out mouse astrocytes...
Maybe this discovery is interesting because it sheds therapeutic light on the dreaded neurodegenerative diseases that killed Woody Guthrie and Lou Gehrig.
Humans can focus on one thing amidst many. “Searchlight of attention” is the metaphor. You recall a childhood friend’s face one moment, then perhaps the dog you loved back then, and then…what you will...
