Pardon Sir?

"I know I'm laughing somewhere
Not here I am for sure"
pardon sir, but we have found
that there is and will be no cure

After many years of figures and microscopes
we gained knowledge, but had no success
I finding why you can't experience
the most joyful moments of happiness

we did try, but found no new day
pardon me sir, but it is all bad news
sorry for the inconvenience
But we're all out of sun and only have dark blues