Answer:
It's been around for millions of years, but is never more than a month old. What is it?
What is put on a table, cut, but never eaten?
Kills the bad ones and the sad ones. Tightens to fit, so one size fits.
What do you use to hoe a row, slay a foe, and wring with woe?
What do you throw out to use and take in when you're done?
What never gets any wetter no matter how hard it rains?