Online class po while there's virus outside the door and in that drawing it means you can have COVID every where that's why you need to do online instead of face to face
As space expanded, the universe cooled and matter formed. One second after the Big Bang, the universe was filled with neutrons, protons, electrons, anti-electrons, photons and neutrinos. During the first three minutes of the universe, the light elements were born during a process known as Big Bang nucleosynthesis.