Why was Venus rather than Mars targeted for the first interplanetary landings?
How many people have returned to Earth in a different type of vehicle than the one that launched them into space?
Why does NASA use the position title "Pilot"' for crew members who are not in charge of piloting the spacecraft?
Are there more performances of Shakespeare’s plays in Germany than there are in England?
Are there modern 1st year university physics textbooks using old-schoool layout, i.e. no sidebars and smaller format?