Joel Duff
Author
Joel Duff is a professor of biology at The University of Akron. He earned his B.S. in biology from Calvin College, and a Ph.D. in botany from the University of Tennessee. He research focuses on understanding biological diversity by examining differences in DNA sequences and genome structure. He has worked on numerous plant and animals systems and has authored more than 40 research articles in science journals. He is an active writer and speaker exploring the intersection of science and Christian faith. He is a contributor to the book Grand Canyon: Monument to an Ancient Earth and blogger at Naturalis Historia (thenaturalhistorian.com). He is an avid nature photographer and enjoys exploring God’s creation with his wife and five children.
- By Gregg Davidson,
- Joel Duff
- and Ken Wolgemuth
A Geological Response to the Movie “Is Genesis History?”
Regardless of whether one thinks the earth to be young or old, Christians should insist on accurately and honestly presented data.

Evolution in a Giant Petri Dish
A new video by Harvard Medical School shows evolutionary processes in action.

Did Modern Animals Evolve From the Inhabitants of the Ark?
Proposed rapid post-flood speciation via natural selection and genetic drift—the mechanisms of evolution—is Answers in Genesis's attempt to rescue the Ark from overcrowding. But it doesn’t help.
My Favorite Fossil: The Extinct Oyster Gryphaea (AKA Devil’s Toenails)
Grand Junction was my childhood playground. It is here that I was first discovered fossils, and one fossil in particular: a member of an extinct group of oysters called “devil’s toenails."
Did 90% of Animal Species Appear about the Same Time as Human Beings?
Contrary to sensational claims on social media, a new scientific study has not overturned evolution.
Mountains, Meadows, and Marmots: Creation or Judgment?
If the characteristics of creation is evidence not of God’s power but of creation falling apart because of sin, how can God’s eternal power and divine nature be clearly seen in the world around us?
- By Gregg Davidson,
- Joel Duff
- and Ken Wolgemuth
A Geological Response to the Movie “Is Genesis History?”
Regardless of whether one thinks the earth to be young or old, Christians should insist on accurately and honestly presented data.

Evolution in a Giant Petri Dish
A new video by Harvard Medical School shows evolutionary processes in action.

Did Modern Animals Evolve From the Inhabitants of the Ark?
Proposed rapid post-flood speciation via natural selection and genetic drift—the mechanisms of evolution—is Answers in Genesis's attempt to rescue the Ark from overcrowding. But it doesn’t help.
My Favorite Fossil: The Extinct Oyster Gryphaea (AKA Devil’s Toenails)
Grand Junction was my childhood playground. It is here that I was first discovered fossils, and one fossil in particular: a member of an extinct group of oysters called “devil’s toenails."
Did 90% of Animal Species Appear about the Same Time as Human Beings?
Contrary to sensational claims on social media, a new scientific study has not overturned evolution.
Mountains, Meadows, and Marmots: Creation or Judgment?
If the characteristics of creation is evidence not of God’s power but of creation falling apart because of sin, how can God’s eternal power and divine nature be clearly seen in the world around us?
- By Gregg Davidson,
- Joel Duff
- and Ken Wolgemuth
A Geological Response to the Movie “Is Genesis History?”
Regardless of whether one thinks the earth to be young or old, Christians should insist on accurately and honestly presented data.

Evolution in a Giant Petri Dish
A new video by Harvard Medical School shows evolutionary processes in action.

Did Modern Animals Evolve From the Inhabitants of the Ark?
Proposed rapid post-flood speciation via natural selection and genetic drift—the mechanisms of evolution—is Answers in Genesis's attempt to rescue the Ark from overcrowding. But it doesn’t help.