ELI5: As the universe expands, what is happening on a micro level where new space is being created (or stretched)?

| Category: Explain

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I read a comment that piqued my interest and have been trying to find some deeper info on the subject. The comment basically said that as the universe expands, something on the Planck level is dividing like cells, producing more space. I’m not asking for an explanation of that concept, but rather wondering precisely what is happening on that scale when space expands.

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TIL Nearly 8% of the human genome is virus DNA. Meaning some of our ancestors survived a virus but still carry the DNA it inserted.

| Category: Learned

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Ancient virus found hibernating in the human genome—and it might wake up

In DNA dig, scientists unearth more viral code, which makes up >8% of our genomes.

The DNA in our own cells isn’t solely ours. More than eight percent of the human genome is not human at all—it’s from viruses. And scientists are still digging up yet more viral code from human DNA that may well influence our lives.

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