Around 1980 I attended a lecture given by Jens Martin Knudsen “the Martian” [1], during which he expressed his belief that most of the carbon and carbohydrates

Around 1980 I attended a lecture given by Jens Martin Knudsen “the Martian” [1], during which he expressed his belief that most of the carbon and carbohydrates in the earth crust stems from incoming asteroids. Jens Martin was a great lecturer. He became my role model. [1] https://en.m.wikipedia.org/wiki/Jens_Martin_Knudsen https://en.m.wikipedia.org/wiki/Jens_Martin_Knudsen