What does a WW1 Trench, A Submarine and a Popular Phone App all have in common?

What does a WW1 Trench, A Submarine and a Popular Phone App all have in common?

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Thirty white horses on a red hill, First they champ, Then they stamp, Then they stand still.

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Tall in the morning, short at noon, gone at night. But I'll be back soon.

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To unravel me you need a simple key, no key that was made by locksmith's hand. But a key that only I will understand.

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Though I wander the earth, I am no longer here. I am pale and I chill everyone near. Who am I?

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What is weightless but it needs two person to hold it?

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Riddle of the Day

Jul 20, 2026

Before Google, we actually had to physically look things up in this building full of knowledge.

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