With 6.8 billion people alive today, it's hard to fathom that humans were ever imperiled. But 1.2 million years ago, only 18,500 early humans were breeding on the planet--evidence that there was a real risk of extinction for our early ancestors, according to a new study.
Apparently at this point in time,
That number is smaller than current figures for the effective population size (or number of breeding individuals) for endangered species such as chimpanzees (21,000) and gorillas (25,000).
Source-Science Now
No comments:
Post a Comment