The article compares the origins of marine and land animals and plants. It looks at how new species and major changes in evolution have decreased over time. The study tests different ideas about why this is happening. It finds that fewer new species and innovations are appearing in all groups, both on land and in the sea. The relationship between the number of species and new origins is stronger in the sea than on land. The study also looks at whether new species appear in a predictable way, finding some evidence for this in insects and certain plants. Overall, the findings suggest that the way new species and major changes happen is different between marine and terrestrial environments.