Sixth great extinction? Or scaring the folks?
At ScienceDaily (Mar. 5, 2011), we are invited to contemplate, “Has Earth’s Sixth Mass Extinction Already Arrived?”, With the steep decline in populations of many animal species, from frogs and fish to tigers, some scientists have warned that Earth is on the brink of a mass extinction like those that occurred only five times before during the past 540 million years.Each of these ‘Big Five’ saw three-quarters or more of all animal species go extinct. Is a three-quarters disappeance – as hinted by the University of California, Berkeley, paleobiologists who published a study in Nature, March3, – at all likely to happen, short of a worldwide nuclear holocaust or giant asteroid hit? Tigers are featured in the article but – Read More ›