Respuesta :

This eggstinct

After discovering a rotten dinosaur egg, Dr. Klogg made a pun relating to egg and the word extinct. 

Correct answer:

This eggstinct

John Harvey Kellogg was an American doctor born on February 26, 1852. Kellogg was a supporter of vegetarianism, and is especially famous for the invention of Corn Flakes breakfast cereals.

Dr. Kellogg said, eggstinct, word composed of the words egg and extinct when he discovered a rotten dinosaur egg.