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What are two materials present in the K-T boundary that support the idea that a 10 km-wide asteroid or comet hit the Yucatán peninsula and caused or accelerated the extinction of 70 percent of all living species on the Earth? Explain where these two materials came from.How long ago did this happen?
Professional Help
Specialized support and advice provided by individuals with expertise in a particular field, especially concerning personal or psychological issues.
Drug Use
The act of consuming substances which alter the physiological or psychological state of an individual.
Sympathetic Nervous System
The part of the autonomic nervous system that prepares the body for action by activating the fight or flight response.
Alcohol
A colorless volatile liquid, it is the intoxicating ingredient in drinks such as beer, wine, and spirits.
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