Latest Molecular clock Stories
This week a ground-breaking new resource for scientists went live. More than twenty paleontologists, molecular biologists, and computer programmers from five different countries designed and contributed to a new open-source database that stores carefully reviewed fossil data and makes it accessible worldwide.
Molecular clocks -- based on changes in genetic material -- indicate much younger ages for a wide variety of plants found as fossils in southern Argentina than do the solid, geologic dates of those fossils
A new study suggests that the evolution of a fungus known as white rot may have ended a 60-million-year-long period responsible for coal deposition.
In classical mythology, the cypress tree is associated with death, the underworld and eternity.
An endangered species of horse -- known as Przewalski's horse -- is much more distantly related to the domestic horse than researchers had previously hypothesized.
A new paper argues that the distributions of the major primate groups are correlated with Mesozoic tectonic features and that their respective ranges are congruent with each evolving locally from a widespread ancestor on the supercontinent of Pangea about 185 million years ago.
Penguins that died 44,000 years ago in Antarctica have provided extraordinary frozen DNA samples that challenge the accuracy of traditional genetic aging measurements, and suggest those approaches have been routinely underestimating the age of many specimens by 200 to 600 percent.
During a seminar at another institution several years ago, University of Chicago paleontologist David Jablonski fielded a hostile question: Why bother classifying organisms according to their physical appearance, let alone analyze their evolutionary dynamics, when molecular techniques had already invalidated that approach?
A new University of Florida study based on DNA analysis from living flowering plants shows that the ancestors of most modern trees diversified extremely rapidly 90 million years ago, ultimately leading to the formation of forests that supported similar evolutionary bursts in animals and other plants.
Did modern birds originate around the time of the dinosaurs' demise, or have they been around far longer? New research offers the strongest molecular evidence yet for an ancient origin of modern birds.
- A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.