Big history

Timeline created by wolfe_skusa
  • -138 BCE

    The Big Bang

    The Big Bang
    The Big Bang Theory is the leading explanation about how the universe began. At its simplest, it says the universe as we know it started with a small singularity, then inflated over the next 13.8 billion years to the cosmos that we know today.
  • -136 BCE

    Stars Light Up

    Stars Light Up
    Stars shine because they are extremely hot (which is why fire gives off light — because it is hot). The source of their energy is nuclear reactions going on deep inside the stars. In most stars, like our sun, hydrogen is being converted into helium, a process which gives off energy that heats the star.
  • Period:
    -138 BCE
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    Big history