Thousands of years ago on the island of Australia; megafauna roamed. By definition; the large animals of a region, these animals are now long extinct. Historically, humans in the past have hunted a multitude of species to extinction; a little over according to ESI international. It is perfectly feasible that….
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Essays on Endangered Species
Mass extinction means three out of every four species you are familiar with would disappear off the face of the Earth, plausibly in time for your grand kids to see it happen, if not before. You may have heard that biologists now agree that's exactly where we're heading. They're calling it the Sixth Mass Extinction, since it would be only the sixth time in half a billion years -- the entire time complex life has been on the planet -- that so many species go extinct so fast. And you've probably heard that it's us, Homo sapiens , who are causing it, by all the ways we are changing the planet.
It is challenging to develop methods to make scientifically sound and unfailing extinction risk duties of species for which is little known. The rapid loss of species seen today is estimated by experts to be between thousand and ten thousand times higher than the natural extinction rate. These experts calculate that between 0. If the low estimate of the number of species out there is true it means that there are around 2 million different species on our planet then that means between two hundred and two thousand extinctions occur every year. Scientists calculate that without humans about one to five species would die a year, which is considered the background rate of extinction.