I think about it like I think about my still-extant student loans.
Overall, there were between 2 and 4 WGDs in plants in the last 300 MY and many extant species like Solanum (potato), Glycine (soybean) or Saccharum (sugarcane) have undergone a recent WGD and are still essentially pseudotetraploid plants with about twice as many gene loci as their close relatives lacking this recent WGD.
For example, I find in myself a great deal of Kantianism extant from my days as a moralist.
My Carnegie quest, to visit the roughly 1,500 extant buildings in my lifetime, is a bit daunting, probably unobtainable, even a little insane, but it is a dream.
Our analyses suggest that many harpaline tribes probably originated ~80 My ago with most of the extant genera evolving 25 - 40 My ago.
Thus the youngest islands (Isabela and Fernandina) are less than 0.5 million years (My) old, whereas the oldest extant islands (San Cristóbal and Española) are more than 2.5 My.
Moving right along, I am sorry to report that my two oldest, dearest chickens died this winter: Tookie, who was the only one of my original four chickens still extant, and Statue of Liberty, a beautiful and freakishly good-natured rooster my neighbor gave me in exchange for my own beautiful and freakishly bad-natured rooster Laura.
I started out in archaeology, but my current research is on extant primate ecology & behavior and tropical forest conservation.
I'm as guilty of this as the next author; in seven published novels, I have one extant mother, although in my defence I do have two fantastic foster mothers, and one much-loved stepmother.
In my talk, after outlining the basic approach, I apply this analysis to inference and relate my groundwork for a theory to extant analyses of inference and reasoning.
If my grandfather's past was still extant, privately, for him, in the copies of the News of the World, the yellow press London paper he subscribed to by mailship, my father's past was sunk five fathoms.
