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The big bang happened 13.7 billion years ago and was discovered by Georges Lemaitre in the 1920s
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only a couple seconds into the big bang there were protons neutrons and electrons, however the universe was way to hot for any elements to form
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After 3 minutes of the big bang the first nuclei were formed. These were hydrogen nuclei. Although the nuclei were formed it was still too hot for any electrons to join and make an atom, and after 20 minutes no more nuclei could be made.
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The first element was formed 380,000 years after the big bang. This is because the universe had to cool down before nuclei could capture electrons and create an element.
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Hydrogen and helium atoms started to form gigantic clouds that would later become stars and galaxies, this was discovered by Cecilia Payne-Gaposchkin
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The first star was formed around 100 to 200 million years after the universe was created. This was just hydrogen and helium at the start, because those were the only elements in the universe at the time. This was discovered by NASA's Wilkinson Microwave Anisotropy Probe
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Our solar system started to form around 4.5 billion years ago. This was found from researchers at UC Davis
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1 billion years after our solar system was formed Earth finally becomes habitable and ready for life
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Billions of years pass on earth before humans were a thing. Humans only started life 7 million years ago. This was discovered by Eugène Dubois.
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In this year the wheel was invented in mesopotamia.
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Lots of cool stuff happened between 3500 bc and 1440 ae but nothing as revolutionary was invented in those times like the printing press. The printing press was invented by Johannes Gutenberg and is the basic building block of every form of media we have today.
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The next biggest invention was the use of steam to power machines. Steam power was invented in 1698 by Thomas Savery. His invention was a machine that could draw water from flooded mines using steam pressure.
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In the early 1750s Ben Franklin discovered electricity but it would be a while before it was used. Then Thomas Edison went and invented the light bulb, the first item to use electricity.
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The next biggest invention was the automatic car. Instead of having to use animals or steam powered trains to get you around, you could drive yourself. It is debated on who was the person that invented the car but credit is most of the time given to Karl Benz for revolutionizing the way we live today.
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The biggest and most revolutionary invention of our time has to be the creation of the internet. The internet was first created in the late 1960s by a man named Robert E. Kahn. Although this was nothing like the internet we know today, it wad the start of the most revolutionary creation of our time.
