I can show you the past, but I am not a photograph. What am I?

Category: Science · Difficulty: hard

Hint: Think about how certain elements can tell us about ages.

Answer

An isotope

Explanation

Isotopes can reveal information about the age of materials through their decay rates.

This is a hard science riddle — a tricky one that takes a little thought. The answer is An isotope.

More Science riddles

All Science riddles · Riddles with answers · Home