Your ecosystem engineer was a dinosaur
ANN ARBOR—Dinosaurs had such an immense impact on Earth that their sudden extinction led to wide scale changes in landscapes—including the shape of rivers—and these changes are reflected in the geologic record, according to a University of Michigan study.
Scientists have long recognized the stark difference in rock formations from just before dinosaurs went extinct to just after, but chalked it up to sea level rise, coincidence, or other abiotic reasons. But U-M paleontologist Luke Weaver shows that once dinosaurs were extinguished, ...