Quick comment on yesterday's challenge...
As several readers have pointed out, the question really boils down to "how can I figure out what news stories were popular over the past 100 years?"
Here's a hint: Can you find a tool or dataset or some mechanism that will let you see that kind of overall popularity?
Find that, and you'll have the answer quickly.
Search on... for the right tool!
(Second hint in tiny font: Not all tools are hidden inside the tent of Google.)