In principle, geolocalization enables people to aggregate content from multiple sites within the same community, as long as those sites offer webfeeds or some other form of subscribable update.

The answer appears on the fifty-fourth page of the book.

a bumpy ride

The brain might have grown bigger due to a tendency towards ever younger features called neotony (cf. Gould 1977; Gould 1980; Lewin 1989; inter al.).