- Renowned biologist cites tragic biodiversity loss. Harvard University Professor and two-time Pulitzer Prize winning biologist and ecologist Edward Wilson warns that biodiversity on Earth is suffering from drastic loss. With just under two million species currently catalogued, an estimated 30 million exist. And although 183 species have been formally declared extinct
since the beginning of the last century, Dr. Wilson states that this number is a vast underestimate, with annual extinctions more likely in the neighborhood of 20-30,000 species.