A new study has revealed the secret behind how some species managed to survive the dinosaur extinction event that occurred nearly 66 million years ago. Scientists now believe that the key to their survival was nitrogen found in the air. This nitrogen provided a protective shield for some species, allowing them to survive the extinction event while other species were wiped out. This is the first time that nitrogen has been identified as a factor in determining which species were able to make it through the catastrophic event. The research team believes that this finding could shed light on other extinction events that have occurred in Earth’s history.

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source: Phys.org