Emphasis Preaching Journal

A New England university biology professor studying horseshoe crabs discovered something very interesting. Their metabolism has a measurable and adaptable rhythm.

Horseshoe crabs live in shallow tidal pools along ocean coasts. When the tide comes in, they feed. When the tide is out, they rest. As one might expect, their metabolic rates spike at the time of high tide. They are quiet when the tide ebbs. This metabolic rhythm remains constant even when the crabs have been captured and live in the laboratory aquarium.