Came across this video about "optogenetics"

controlling the brain with light

ultra violet light damages your skin

RED light is much safer, also penetrates the tissue much better

which allows you to control much larger brain areas

"we would like to have different colors to control different circuits

all at the same time"

"viruses are our allies in that we can package the opsins DNA

into a virus and inject it into a very local brain area"

https://www.youtube.com/watch?v=kwt0UfFHgU8

Note:

the underscore _ is used commonly

as a space in internet addresses

because nothing can be blank in the address

thus it is a connecting marker

with no meaning

just wondering if anyone has tried it in a browser or search engine

for any web address connection