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. Calcite tests of extinct species of planktonic foraminifera from the Eocene epoch (>34 million years) of Tanzania.  The largest is less than a millimetre in size [Credit: Paul Pearson, Cardiff University]By analysing the fossil record of microscopic aquatic creatures called...

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Via: The Archaeology News Network