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13 BCE
Big bang
The Big Bang refers to the moment when the universe began to rapidly expand and cool down from a very hot and dense state. This expansion is still happening today and is responsable for the structure and evolution of the universe as we know it. -
13 BCE
The Formation of Atoms
The first elements formed are hydrogen and helium.
The first subatomic particles formed are the electron
Neutrons and proton came later on. -
13 BCE
Formation of the Earliest Stars & Galaxies
A nebula is a cloud of gas and dust in space. The main gases in a nebula are hydrogen and helium. When gravity causes the gas and dust in the nebula to collapse in on itself. The pressure and heat from the collapsing gas and dust eventually cause nuclear fusion to occur, which creates enough energy to make the star shine. -
4 BCE
Formation of Our Solar System and Planet Earth
States that the sun and planets formed from a giant, rotating cloud of gas and dust known as the solar nebula. Over time this cloud of gas and dust collapsed under its own gravity, which caused it to spin faster and flatten into a disk shape. The sun formed at the center of this disk, while the planets formed from the material that was left over after the sun’s formation. -
4 BCE
Formation of the Earth’s Moon
The Giant-impact hypothesis is a theory that explains the formation of the moon. According to this theory, the moon formed when a Mars-sized object collided with the Earth, shortly after the Earth’s formation. The impact caused debris from Earth and Mars-sized objects to be ejected into space, which eventually came together to form the moon. -
3 BCE
The Earliest Life on Earth
Primordial soup is a term used to describe the hypothetical conditions present on Earth before life existed. It refers to the mixture of organic compounds, such as amino acids, that may have accumulated in the oceans and atmosphere of the early Earth. This mixture is thought to have provided the building blocks necessary for the development of life. -
3 BCE
Extinction of the Dinosaurs
The most widely accepted theory for the extinction of the dinosaurs is that a large asteroid impact caused a catastrophic event that wiped them out. This event, which occurred around 66 million years ago, caused global climate change, wildfires, and a massive dust cloud that blocked out the sun, leading to a rapid cooling of the Earth's surface. -
3 BCE
Earliest Humans Evolve
