The so-called Tree of Life is actually an anastomosing plexus rather than a divaricating tree, due to extensive interconnections between th...

Lake Malawi, in south-eastern Africa, is famous for its large diversity of cichlid fishes. Indeed, it sometimes seems to have more biologist...

Over the years, a number of methods have been explored for constructing evolutionary networks, starting with parsimony criteria for optimiz...

It has traditionally been assumed that speciation occurs when gene flow between populations ceases. However, nothing in biology ever remain...

As a means of motivating his interest in speciation, in The Origin of Species Charles Darwin highlighted the diversity of morphological fo...

Recently, a number of computer programs have been released that are intended to produce phylogenetic networks representing introgression (o...

It has been noted before that we have a wide range of mathematical techniques available for producing data-display networks, most notably t...

Phylogenetic networks are of two types: those that produce direct evolutionary inferences about gene flow (eg. hybridization networks, HGT ...

The full title of Charles Darwin's most famous book was On the Origin of Species by Means of Natural Selection, or the Preservation of ...

In a previous blog post ( Charles Darwin's family pedigree network ), I mentioned several well-known people who were involved in a cons...

It is widely known that Charles Darwin was married to his first cousin Emma Wedgwood. Emma came with a substantial dowery, being the grand-...

I have noted before that a pedigree is a network not a tree, and specifically it is a hybridization network ( Family trees, pedigrees and h...

A family tree is technically called a pedigree. This is because it is not really a tree. Branches do not fuse in a tree, whereas in a pedig...