Theories taking U turn

hi
Recently I have come accros two new theorirs proposed by reknowned researchers. The theories are completely opposite to exesting theories. It is interesting to note how the things are taking U turn in course of research
1)Wun-Yi Shu of the National Tsing Hua University,Tiwan,suggest that there is no begining or end of the Universe.In a paper published on site ArXiv.org, Shu describe the mass and length are interchangable.
2)A polish cosmologist suggested that, our Universe could exist inside a blck hole!!
Any comments
Amit