GitHub's CEO, Nat Friedman, stepped down recently to focus on his startup roots. Chief product officer, Thomas Dohmke, will be moving to CEO. The Verge reviewed our no-longer-a-joke April Fool's keyboard. How many keyboard layouts are there anyway? Including non-English layouts, there's lots. Do you have a mind's eye? How about an inner monologue? We explore why some people have a voice in their head when they think and some don't.