The hunter gatherer are wandering food collectors.
The hunter gatherer affected their environment by setting fire to prairies. They do this in order to have open fields that will be convenient for their hunting activities. Hunter gatherer brought about extinction of many big animals due to over hunting.
The larger the mass, the greater the gravitational pull. bigger planets have a greater gravitational pull so smaller planets get pulled in and start to orbit them.
Answer:
The search of antimatter in cosmic rays is also related to the possible existence of primordial black holes (PBH), remnants of a primeval phase transition.