Never Resting, Never Still. Moving Silently From Hill To Hill Riddle

Riddle: Never resting, never still. Moving silently from hill to hill. It does not walk, run or trot, All is cool where it is not. What is it?

Answer: Sunshine.

Source: https://www.riddles.com/index.php/271

Never resting, never still. Moving silently from hill to hill. It does not walk, run or trot, All is cool where it is not. What is it? — Never resting, never still. Moving silently from hill to hill Riddle by Sphinx Riddles v1.

Riddle: Never resting, never still. Moving silently from hill to hill. It does not walk, run or trot, All is cool where it is not. What is it? Answer: Sunshine. — by Sphinx Riddles v2.