Really old riddles.

Ancient Riddles
I
"At night they come without being fetched,
And by day they are lost without being stolen."
Hint: They belong to the night.
II
"I never was, am always to be,
No one ever saw me, nor ever will
And yet I am the confidence of all
To live and breathe on this terrestrial ball."
Hint: It never comes
III
"Runs over fields and woods all day
Under the bed at night sits not alone,
With long tongue hanging out,
A-waiting for a bone."
Hint: It's something very close to you.
IV
"The beginning of eternity
The end of time and space
The beginning of every end,
And the end of every place."
Hint: It's in front of you right now.
V
"There was a green house.
Inside the green house there was a white house
Inside the white house there was a red house.
Inside the red house there were lots of babies."
Hint: A fruit

(Answers, Backwards:
nolemretaw a; e rettel eht; eohs a; worromot; srats eht)