Redoxoma NewsletterFebruary 2020 Cover image adapted from original by Polina Tankilevitch, at Pexels (licensed under Pexels License) Contents Editor's pageby Francisco Laurindo & Flavia MeottiEditorial Main Articleby Beatriz AlvarezSomething looks rotten in the Redox Kingdom… The Emerging Biochemistry of Hydrogen Sulfide and Persulfides Highlightsby Daniela Truzzi and Ohara AugustoPeroxiredoxin hyperoxidation increases in the presence of bicarbonate/carbon dioxide Highlightsby Marcela F. MineiroTo adhere or not to adhere? This is the disulfide exchange question! Radical-Free Cornerby Alicia Kowaltowski & coauthorsSelecting the best journals for our papers Redoxoma Highlightsby Danilo Grünig Humberto da SilvaCycles of sickles