Popcorn-like fossils provide evidence of environmental impacts on species numbers

The number of species that can exist on Earth depends on how the environment changes, according to new research led by the University of Southampton.By analysing the fossil record of microscopic aquatic creatures called planktonic foraminifera, whose fossil remains now resemble miniaturised popcorn and date back millions of years, the research provided the first statistical evidence that environmental changes put a cap on species richness.
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