Almost all living things have an internal 24-hour clock that remains accurate regardless of temperature or other environmental changes. This clock is a highly sophisticated yet simple timekeeping mechanism that is critically important to many functions, including metabolism and survival. Until now, the influences keeping the internal clock ticking reliably were unknown.

Almost all living things have an internal 24-hour clock that remains accurate regardless of temperature or other environmental changes. This clock is a highly sophisticated yet simple timekeeping mechanism that is critically important to many functions, including metabolism and survival. Until now, the influences keeping the internal clock ticking reliably were unknown.

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