Evolutionary Biology News -- ScienceDaily

Evolution. Read about natural selection in a flask and genetic variation in flowers. Consider the evolution of human social behavior, and more.

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Origins of life: Chemical evolution in a tiny Gulf Stream

Chemical reactions driven by the geological conditions on the early Earth might have led to the prebiotic evolution of self-replicating molecules. Scientists now report on a hydrothermal mechanism that could have promoted the process.

New insight into the evolution of complex life on Earth

A novel connection between primordial organisms and complex life has been discovered, as new evidence sheds light on the evolutionary origins of the cell division process that is fundamental to complex life on Earth.

DNA from an ancient, unidentified ancestor was passed down to humans living today

A new analysis of ancient genomes suggests that different branches of the human family tree interbred multiple times, and that some humans carry DNA from an archaic, unknown ancestor.

Faster rates of evolution are linked to tiny genomes

Inside every cell lies a genome - a full set of DNA that contains the instructions for building an organism. Across the biological world, genomes show a staggering diversity in size but scientists still don't fully understand why. Now, scientists have found a link between mutation rate - how quickly the DNA sequence changes - and genome size. Writing...

Dinosaur relative's genome linked to mammals: Curious genome of ancient reptile

Biologists have sequenced the genome of the tuatara, a lizard-like creature that lives on the islands of New Zealand.

Ancient mountains recorded in Antarctic sandstones reveal potential links to global events

A new analysis of sandstones from Antarctica indicates there may be important links between the generation of mountain belts and major transitions in Earth's atmosphere and oceans. A team of researchers analyzed the chemistry of tiny zircon grains commonly found in the Earth's continental rock record to determine their ages and chemical compositions.

Ancient mountain formation and monsoons helped create a modern biodiversity hotspot

Researchers examined the plant life in the China's Hengduan Mountains, the Himalaya Mountains, and the Qinghai-Tibet Plateau. Using DNA to build family trees of species, they learned that the diversity of plants in that region today can be traced back to newly-formed mountain ranges 30 million years ago, and monsoons that came later. It's a concrete...

Remote islands: Stepping stones to understanding evolution

Researchers have investigated evolutionary and ecological changes in ants in the South Pacific archipelago of Fiji to examine a controversial theory for how evolution occurs on islands.

Study sheds light on the evolution of the earliest dinosaurs

Geological evidence suggests the known dinosaur groups diverged early on, supporting the traditional dinosaur family tree.

New paper squares economic choice with evolutionary survival

Unlike businesses or governments, organisms can't go into evolutionary debt -- there is no borrowing one's way back from extinction. This can lead to seemingly irrational economic choices that suddenly make sense when viewed as a multiplicative, evolutionary process.

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