| We next estimated the likelihood of the data under a unique ratio among all lineages. |
| Yet evolution predicts not just successions of forms, but also genetic lineages from ancestors to descendants. |
| By the Miocene, whales of both lineages are relatively common fossils in many marine deposits. |
| Each of these lineages radiated separately, with genus succeeding genus for the 10-20 million years of this era. |
| The reactivation of dormant genes in fossil lineages after long time periods is considered a likely evolutionary mechanism. |
| Rate variation among lineages is the footprint of selection and can be indicative of species radiations or differential structural constraints. |
