Magic.
they discovered fire
The same year that man discovered fire.
Fire is a natural phenomenon and thus it was not invented. on the other hand, fire was definitely discovered by man before the wheel was invented.
paleolithic people discovered fire by trying different things we the things they have eventually they rubbed to rocks together and invented fire
The fire engine was created or discovered the fire engine by John Erickson.
Nature won that award. Man discovered fire as a source of warmth very early. No one knows who used fire first.
Fire is a natural phenomena. Its discovery pre-dates history. It will have been 'discovered' by many people in many places.
Peking Man is an example of Homo Erectus that was discovered in China between 1923 and 1927. The impact of the discovery and use of fire revolutionized everything from metal working to clay wares.
It wasn't until 1.2 million years ago that man discovered fire. In 2012 two archaeologists found a fire pit. Eventually man learned to build dedicated hearths and remains date back to 42,000 BC.
I am going to be picky here and say man did not invent it, he discovered it. There was plenty of natural fires around him, due to things like lightning, he simply discovered the joy of it's warmth, it's ability to keep predators away and the way it cooks meat. For the longest of times man did not create fire for himself, he would instead keep fires going for ever and ever, using lit branches to move the fire to new places. Eventually, one clever man or woman must've realized the relation between fire and heat, and learned that with enough heat, they could create new fire.
A couple million years ago, give or take a couple hundred thousand.
Man likely discovered that fire was good by observing natural wildfires and realizing the benefits of warmth and the ability to cook food. The ability of fire to provide light, heat, and protection from predators would have also contributed to its perceived goodness.