Answer:
What has been around for millions of years but is never more than a month old?
This is a shape and a symbol that we literally cannot live without. What is it?
What is in seasons, seconds, centuries, and minutes, but not in decades, years, or days?
What is between heaven and earth?
Before Mount Everest was discovered, what was the highest mountain on Earth?
What is the middle of water but is not an island?