Back from the dead: One third of 'extinct' animals turn up again

See Daily Mail Sept 29, 2010 article at http://www.dailymail.co.uk/sciencetech/article-1315964/One-extinct-animals-turn-again.html by David Derbyshire Environment Editor
• “Conservationists are overestimating the number of species that have been driven to extinction, scientists have said.”
• “A study has found that a third of all mammal species declared extinct in the past few centuries have turned up alive and well.”