Man of old, it is told would search until he tired,
not for gold, ne'er be sold, but what sought he was fire.
Man today, thou mayst say, has quite another aim,
in places deep, he did seek, to find me for his gain!
Answer: Oil.
This riddle appears in the following downloadable PDF files:
Can you solve one of the most famous logic puzzle ever?
Memory Matching game for kids, adults and seniors.
Connect the matching tiles and pop them all.