system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How did the litre (volume) come to be? In other words if we had to start from the dark ages again, how could one replicate the volume measurement of 1 Litre?
gpt
The metric system is based on the distance from the North Pole to the equator, on a line passing through Paris. This distance, divided by 10,000,000 equals one metre. One metre divided by 1000 equals one millimetre. One cubic millimetre of water equals 1 millilitre. 1000 millilitres equals one litre.