Category Archives: EvolutionThe newly sequenced genome of a dainty, quill-like sea creature called a lancelet provides the best evidence yet that vertebrates evolved over the past 550 million years through a four-fold duplication of the genes of more primitive ancestors.
The late geneticist Susumu Ohno argued in 1970 that gene duplication was the most important force in the [...]
If you are curious about Earth’s periodic mass extinction events such as the sudden demise of the dinosaurs 65 million years ago, you might consider crashing asteroids and sky-darkening super volcanoes as culprits.
But a new study, published online, in the journal Nature, suggests that it is the ocean, and in particular the epic ebbs and [...]
Scientists have put more meat on the theory that dinosaurs’ closest living relatives are modern-day birds. Molecular analysis, or genetic sequencing, of a 68-million-year-old Tyrannosaurus rex protein from the dinosaur’s femur confirms that T. rex shares a common ancestry with chickens, ostriches, and to a lesser extent, alligators.
The dinosaur protein was wrested from a fossil [...]
Before life emerged on earth, either a primitive kind of metabolism or an RNA-like duplicating machinery must have set the stage – so experts believe. But what preceded these pre-life steps?
A pair of UCSF scientists has developed a model explaining how simple chemical and physical processes may have laid the foundation for life. Like [...]
A new, complete ‘tree of life’ tracing the history of all 4,500 mammals on Earth shows that they did not diversify as a result of the death of the dinosaurs, says new research published in Nature today.
The study was undertaken in the UK by scientists at Imperial College London and the Zoological Society of London [...]
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