When I started bird-watching as a teenager, a few years after the first Earth Day in 1970, several species that once thrived ...
1 Centre for Respiratory Research, Department of Medicine, Royal Free and University College Medical School, The Rayne Institute, London WC1E 6JJ, UK 2 Instituto Nacional de Enfermedades Respiratorias ...
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The most expensive pets in the world and what makes them so pricey
The most expensive pets in the world today sell for over a million dollars, as more people are willing to pay a premium for ...
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