human
I've heard that the Earth has a 'biological clock'. What exactly does that mean?
assistant
The biological clock is the idea that there is an internal timer in all living things, and that it ticks at different rates for different species. For example, humans have a biological clock that ticks at about 1/100th of a second per year. This means that if you are born on January 1st, your biological clock will be set to tick at midnight on January 2nd.