The impact of the asteroid, which created the Chicxulub crater beneath the Mexican Yucatan Peninsula, was one of the most destructive events in Earth's history, extinguishing 75% of the planet's animal and plant species. including massive tsunami-like surges and "ejecta" – torrents of rocks, like fine sand and small glass beads – the report said.
At the Fossil Site – Tanis in North Dakota's Hell Creek Formation – the surge left "a tangled mass of freshwater fish, terrestrial vertebrates, trees, branches, logs, marine ammonites and other marine creatures," DePalma, a student from the University of Kansas, said.
"No other site has a record like that," said DePalma. "And this particular event is tied directly to all of us – to every mammal on Earth, in fact. Because this is basically where we inherited the planet, it was not the same after that impact. planet of dinosaurs. "