We are all familiar with the concept of a family tree (formally called a pedigree). People have been compiling them for at least a thousand...

This is a joint post by Magnus Lidén and David Morrison The Swedish biologist Carl Linnaeus (1707-1778) is well known in biology as the ...

I noted in an earlier post ( Drawing family trees as trees ) that from 1576 CE Scipione Ammirato, an Italian writer and historian, set up a...

The stemmata in ancient Roman houses (depicting portraits of ancestors) were used to assert the nobility of the nobles by right of family d...

I have written a number of times in this blog about the strong tendency for people to present reticulating evolutionary relationships as tr...

In a previous blog post ( Who first drew a family tree as a tree? ), I pointed out that one of the candidates for drawing the first family ...

I have noted before that the genealogies for all domesticated organisms are networks not trees, and specifically they are hybridization net...

The Online Etymology Dictionary indicates that the English-language expression "Family tree" in the sense of "graph of ance...

I have previously pointed out that phylogeny reconstructions exits for legendary figures, cartoon animals, Donald Duck, Pokémon, and dragon...

I have noted before that common usage of expressions like "family tree" often extend far beyond actual pedigrees. This particular...

I have noted before that Pedigrees and phylogenies are networks not trees . For example, a human family "tree" is a tree only if ...

In a few recent blog posts I have discussed the early history of pedigrees, noting that they were usually presented as descent trees (with ...

To a modern phylogeneticist the answer to this question is obviously "no". Phylogenetic trees occur in the literature with their ...

Networks are visually more complicated than trees, because there are extra edges representing reticulate relationships. Technically this me...

Phylogenetic trees have been drawn in many formats, including what are known as vertical, horizontal, multidirectional, radial, hyperbolic ...