In the morning of life I'm on four legs,
In the evening I'm on two,
And at night I'm on three,
What am I?
A man comes across a sphinx who will eat him if he doesn't answer the riddle right. Here's the riddle.
Answer: A Human.
MORNING OF LIFE
A baby that crawls on all fours
An adult that walks with ease
An old man with his trusty cane