December 12, 2011
November 21, 2011
November 6, 2011
October 31, 2011
October 6, 2011
September 26, 2011
September 18, 2011
Hybridization Zones
A hybrid zone exists where the ranges of two interbreeding species meet. For a hybrid zone to be stable, the offspring produced by the cross (the hybrids) have to be less fit than members of the parent species. Hybrid zones and gene flow do not inevitably lead to the recombination of the two populations involved, but can instead continue for thousands of years. The predominant explanation for this is that the hybrid zone represents a ‘tension zone' between the conflicting effects of dispersal of parental forms and selection against hybrids.
A New Shape in Ship Travel - 1961
“Emerging from the mist over the North River, like Caesar approaching Rome, a legion of city dignitaries aboard the tugboat Cynthia Moran pulled into the south side of the old Pier 38 at the foot of King St. yesterday… Debarking were more than 100 businessmen, labor leaders and city officials [for a] gala, old style ceremony marking the first concrete pour in the construction of New Pier 40.”
The Villager 1958
image and excerpt taken from: link
Subscribe to:
Posts (Atom)