What was the longest river in the world before the Amazon River was discovered?

What is the building that you leave without ever having entered.

What can you stick between a 3 and a 4 so that the result is more than three but less than four?

Why can't Kevin, who is now living in Canada, not be buried in the USA?

What is the largest $ amount of change you can have in your pocket without having exact change for $1?