For much of the past century, scientists believed dinosaurs were already in decline when the asteroid struck 66 million years ago — but a 2025 study published in Science found fossils in New Mexico showing they were flourishing in diverse, thriving ecosystems right up until the moment of impact

For much of the past century, many scientists believed the dinosaurs were already in decline when the asteroid struck 66 million years ago, a group past its prime that a cosmic accident merely finished off. A 2025 study published in the journal Science, built on fossils from New Mexico, argues almost the opposite. Right up [...] The post For much of the past century, scientists believed dinosaurs were already in decline when the asteroid struck 66 million years ago — but a 2025 study published i