Answer:
I am heavy forward but backward I'm not.
It's been around for millions of years but is never more than a month old. What is it?
If you lose one of me, you are upset, bewildered, and perplexed. If you lose two of me, you are blissfully unaware. What am I?
Before Mount Everest was discovered what was the highest mountain on Earth?
I am one with eight to spare, lest I lose my one. I'm not a number. What am I?
What made Cyclops quit teaching?