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What is the recommended duration for a session of cardiorespiratory endurance exercise?
Marine Invertebrate Fossils
Fossils of animals that lived in the sea and did not possess a vertebral column, important for understanding Earth's history and evolution.
David Raup
A notable paleontologist who made significant contributions to the understanding of patterns of extinction and the dynamics of biodiversity over geologic time.
Permian Extinction
A massive extinction event occurring about 252 million years ago, marking the boundary between the Permian and Triassic periods, and resulting in significant loss of species.
Carbon Dioxide Levels
The concentration of CO2 in the Earth's atmosphere, an important factor influencing climate change and global warming.
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