Thunderbolts.info is always a bountiful source of paradigm-challenging ideas. Some of their speculations may be off (especially any specific dates left behind by their Godfather, Velikovsky), but some of their predictions have
And portals — well, they sort of find you, rather than the other way around. I mean, you can take gobs of drugs, combine any which way, and still not have one. On the other hand, you put enough people together in altered states, in the right geography, and the right timing, and they seem more prone to appear.