The historic Facts:

1. In the 1970s, W.G. Tifft discovers that Redshifts, in galaxy clusters, are quantized.

2. In the 1990s, two English astronomers, B.N.G. Guthrie and W.M. Napier rediscover and confirm the observations of W.G. Tifft.

3. The cosmologists dispute, unsuccessfully, the results; then, withstanding the facts, they simply ignore them.

 
W.M. Napier

The Observations:

1. It is a combinatorial and statistical analysis. The intervals between the redshifts of any two galaxies is measured for all the galaxies of the cluster. (In this case, the local super cluster).

2. Redshifts appears with systematic  intervals of 37,2 to 37,7 Km/s.

3. We notice that this period is of the order of H/2! (Strange, very strange)

Harmonics and sub harmonics?
 
If in the local super cluster, Redshifts appears with systematic intervals of 37,2 to 37,7 Km/s, in others cluster, we observe periodic intervals of 72 Km/s.
 
No one has a convincing explanation.
The Big Bang Theory  says nothing about this.
Alternative Theories suggest nothing.
 
Should we turn the page?

Bibliography:

Source: NED

1. B.N.G. Guthrie & W.M. Napier:
   The Virgo Cluster as a test for Quantization of extragalactic redshifts.
   Redshift periodicity in the local supercluster.
   Evidence for redshift periodicity in nearby field galaxies.

2. W.G. Tifft:
   TheWilliam Tifft Blog.
   Scientific Association for the Study of Time in Physics and Cosmology
   Global redshift periodicities and variability.
   Global redshift periodicities and periodicity structure.
   Statistical procedure and the significance of periodicities in double-galaxy redshifts.

3. Others:
   On the structure of spacetime and matter as obtained from the Planck scale by period doubling in three and four dimensions (A possible explanation by Ari Letho).