Why is the big bang a theory and not a fact?

because no one is able to witness it
because there are no theories that could be possible.
because theories never turn into facts.
because there are no such things as facts.

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Agene editing technology called crispr-cas9 uses cellular machinery to change the cell's genetic material. how might this technology be useful in treating diseases like cancer?

In the diagram below, which organelle is a ribosome, which combines amino acids and produces proteins? оооо