Rise of marine predators reshaped ocean life as dramatically as mass extinctions – Research News https://www.floridamuseum.ufl.edu/science/marine-predators-reshaped-ocean-life-mass-extinction-scale/
Evolutionary arms races between marine animals overhauled ocean ecosystems on scales similar to the mass extinctions triggered by global disasters, a new study shows. Scientists at Umeå University in Sweden and the Florida Museum of Natural History used paleontological databases to build a multil
After death, ammonites would commonly float due to trapped gas in their shells.