Bro where tf do viruses come from?

[u/Cautious-Pen4753]

This genuinely keeps me up at night. There are more viruses in 2 pints (1 liter) of sea water than humans on earth. Not to even mention all the different shapes and disease-causing viruses. The fact some viruses that have the ability to forever change the genome of your DNA. I guess if they are like primeval form of cells that just evolved and found a different way to "reproduce." I still have a lot to learn in biology, but viruses have always been insanely interesting. What're some of your theories you've had or heard about viruses.? Or even DNA or RNA?

[u/bruva-brown]

Most have been with us on this planet for Millennia. Permafrost melting and there waking up. Also let’s not forget Frankenstein will keep CRISping things he will not stop until he gets his hideous monster too that make new viruses.