Faster than light, naturally

A clever scientist has proposed what can naturally move faster than light.

Hint: what obstructs light faster than its presence.

Answer, shadow does move faster than light can.

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Consider, also, shadow successfully can block light, at least visible spectrum. Usually with shadow present light does not shine through.

Further, without a lamp, how with visible spectrum can anything be seen at the depths of the bottom of our oceans or deep caves? Or the shades of trees or shaded side of a planet, etc. ?

Note: the material herein is not necessarily a reflection of entropy of current societies.