Dr. Elizabeth Yuko is a bioethicist and adjunct professor of ethics at Fordham University. She has written for The New York Times, The Washington Post, The Atlantic, Rolling Stone, CNN & Playboy.

Add Yahoo as a preferred source to see more of our stories on Google. Luckily, getting your lights back in working order (or identifying that they cannot be fixed and will need to be replaced instead) ...

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Know Your Stuff is a column that unlocks the hidden secrets about the everyday products you own. We're all looking to bring a little extra brightness into the end a difficult year. But no matter what ...