Neither dimension alone is sufficient.

Together, they begin to approach the full complexity of what the Hourglass Cave discovery represents.

The Passage, The Dark, And The Distance

Return, one more time, to the cave.

The entrance is somewhere on a Colorado mountainside, at an elevation where the air is noticeably thin and the nights are cold even in summer.

A person entering the cave for the first time — stepping from the thin, bright air of the alpine environment into the narrow, dark throat of the passage — would experience an immediate and total transformation of their sensory world.

The light disappears within the first few feet.