What is a presumed sign of life doing on a dead comet?

Media coverage

• Title	What is a presumed sign of life doing on a dead comet?
  Degree of recognition	International
  Media name/outlet	Science.org
  Media type	Web
  Date	26/04/2024
  Producer/Author	Elise Cutts
  URL	https://www.science.org/content/article/what-presumed-sign-life-doing-dead-comet
  Persons	Tim Lichtenberg