Many bacteria reproduce asexually. the bacterium shown here is reproducing asexually, by binary fission. the definition of a is a group of interbreeding individuals cannot be easily applied to organisms that reproduce only or mainly by asexual methods.

Lacking something of the ozone layer

Many archeologists and anthropologists disagree with dr. thorne's view.  thorne strongly believes that what many calls "homo erectus"  was in fact  homo sapiens,  and that they migrated out of africa almost 2 million years ago and dispersed throughout europe and asia. that's way different  from what scientists have always believed about the evolution of the species.