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What was the first thing scientists discovered? – Jacob, age 9, Santiago, Panama
All societies have had ways of understanding nature based on their experiences of it. For example, farmers need to understand the seasons and weather to know when to plant and harvest their crops. Hunters need to understand the lives of animals to know how to hunt them.
This kind of understanding of the natural world isn’t quite the same as science though. Science typically refers to knowledge that’s more organized and formal than that. It’s not just an explanation, but a system that uses observations and experiments to build theories that are recorded, passed on to others and built on.
With that idea in mind, as a historian of science, my best answer to the question of what the first scientists discovered is Babylonian astronomy.
The Babylonians lived from about 2,500 to 4,000 years ago in the area that’s now Iraq. What makes Babylonian astronomy stand out as being especially scientific is the careful, organized way in which Babylonian scribes – their keepers of knowledge – observed, recorded and eventually mathematically predicted the ways that the Sun, Moon, stars and planets move in the skies.
Babylonian astronomy was uniquely scientific
Before clocks, observing the sky was how people knew the time. During the day you can see the Sun, and at night you can see the stars. Many calendars are based on the skies too. A month is about how long it takes the Moon to go through its phases. A year is one full revolution of the Earth around the Sun.
But keeping track of time wasn’t the only way the Babylonians used astronomy. Like today’s world, Babylonia could be both predictable and chaotic. The weather changed with the seasons; crops were planted and harvested; festivals were celebrated; people were born, aged and died, all predictably. But a bad harvest might cause high prices for grains and starvation; a king might die young, causing political upheaval; a disease might kill thousands, all unpredictably.
The stars and planets can seem like that, too. The stars are always in the same places in relation to one another, so you can identify constellations, and those constellations rise and set at regular times over the course of a year. But the planets move around – they’re not always in the same places, and sometimes they even seem to stop and move backward in their paths. Sometimes even more spectacular events occur, such as eclipses.
An eclipse might have seemed like a powerful omen of something that would happen next.
Josh Edelson/AFP via Getty Images
For the Babylonians, those ideas were linked. They saw changes in the motions of the planets or rare events such as eclipses as signs – omens –…
