The Bible teaches that all of creation, which would include dinosaurs, was subject to the effects of the fall, including death. Environmental and dietary changes of the post-flood world likely contributed to the extinction of dinosaurs.
The Bible teaches that all animals were created by God on the sixth day, which would have included dinosaurs (Genesis 1:24–25). While the word “dinosaur” does not appear in Scripture since it was coined by British paleontologist Richard Owen in the 1800s, passages like Job’s descriptions of Behemoth and Leviathan may point to massive, ancient creatures (Job 40:15–24; 41). Like all creation, dinosaurs were affected by the fall, when death and decay entered the world through sin (Romans 8:20–21). The global flood and the radically changed post-flood environment likely contributed to the dinosaurs' extinction, along with the fact that humanity was now permitted to hunt and eat animals (Genesis 2:5–6; Genesis 9:2–3). By the time of the New Testament, there is no mention of dinosaurs, suggesting they had already disappeared from the earth. The dinosaurs' extinction is not outside of biblical explanation but fits within the broader reality that all creation is subjected to futility because of sin. Yet Scripture also points forward to hope, where creation itself will one day be set free from corruption through Christ’s redemption (Romans 8:20–21).
For twentieth-century kids, dinosaurs are big, purple, and sing or are toys found in Fruity Pebbles. That makes it hard to think of them as real creatures who once roamed the Earth. Some Bible skeptics point to dinosaurs to argue against the Bible. But the existence of dinosaurs isn't incompatible with a biblical worldview.
In fact, the Bible provides a reason for the extinction of such creatures: the fall. Sin infected all of creation. Paul writes about the "futility" creation was subjected to (Romans 8:20) and the glorious promise that "creation itself will be set free from its bondage to corruption and obtain the freedom of the glory of the children of God" (Romans 20:21). Because Christ paid the price for our sin, we and all of creation will be free from sin one day—no death, no extinction.