Many Christians believe that creation was cursed because of Adam & Eve's fall into sin, and that death entered creation because of the fall but not before. In other words, the idea of pre-fall death is rejected. I personally believe that this is a very reasonable position to hold from a Scriptural standpoint and that compelling Scriptural arguments can be made in its favor. However, matters get complicated when secular scientific theories are brought into the picture. In particular, a mass extinction event known as the Cretaceous–Paleogene extinction event (which is commonly believed to be the responsible for the mass extinction of dinosaurs about 66 million years ago) might become a non-trivial complication for the "no pre-fall death" view. Below a few quotes from the Wikipedia article:
The Cretaceous–Paleogene (K–Pg) extinction event[a] (also known as the Cretaceous–Tertiary (K–T) extinction)[b] was a sudden mass extinction of three-quarters of the plant and animal species on Earth, approximately 66 million years ago. With the exception of some ectothermic species such as the sea turtles and crocodilians, no tetrapods weighing more than 25 kilograms (55 pounds) survived. It marked the end of the Cretaceous period, and with it the end of the entire Mesozoic Era, opening the Cenozoic Era that continues today.
As originally proposed in 1980 by a team of scientists led by Luis Alvarez and his son Walter, it is now generally thought that the K–Pg extinction was caused by the impact of a massive comet or asteroid 10 to 15 km (6 to 9 mi) wide, 66 million years ago, which devastated the global environment, mainly through a lingering impact winter which halted photosynthesis in plants and plankton. The impact hypothesis, also known as the Alvarez hypothesis, was bolstered by the discovery of the 180 km (112 mi) Chicxulub crater in the Gulf of Mexico's Yucatán Peninsula in the early 1990s, which provided conclusive evidence that the K–Pg boundary clay represented debris from an asteroid impact.The fact that the extinctions occurred simultaneously provides strong evidence that they were caused by the asteroid.
A wide range of species perished in the K–Pg extinction, the best-known being the non-avian dinosaurs. It also destroyed myriad other terrestrial organisms, including some mammals, birds, lizards, insects, plants, and all the pterosaurs.
If we assume that 1) those who reject pre-fall death are right and 2) the scientists advancing the Cretaceous-Paleogene extinction event are also right, then it would logically follow that Adam and Eve had to have existed millions of years ago prior to the extinction of dinosaurs -- an idea that I would find hard to reconcile with the genealogies connecting Adam to Jesus in the Bible.
Question: How do Christians who reject pre-fall death reconcile their views with the Cretaceous–Paleogene extinction event that is believed to have caused the mass extinction of dinosaurs and other species about 66 million years ago, according to scientific sources?