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May
1
Walcott’s Quarry #101: Jordan’s Rule
Filed Under Walcott's Quarry
In case this whole comic needs some clarification:
Jordan’s Rule
An evolutionary rule that states that the closest genetic relatives of a given species are found very near it, but the two groups are isolated by some kind of natural barrier (such as a river) that neither species can cross easily.
(via http://www.cartage.org.lb/en/themes/Reference/dictionary/Biologie/J/05.html)
This is one of my favorites now.