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image: New Giant Virus Group Reported

New Giant Virus Group Reported

By | April 6, 2017

A genomic analysis of “Klosneuviruses” suggests that they evolved from small viruses that accumulated genetic material over time, but not all virologists are convinced. 

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Recolonizing middle-aged animals with bacteria from younger ones kept killifish alive longer than usual, researchers report.

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image: Study: Diet Contributes to Brain Size

Study: Diet Contributes to Brain Size

By | March 30, 2017

The results of a historical primate behavior analysis suggest that species with fruit-filled diets evolved larger brains.

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image: In Certain Social Bees, Gut Microbiomes Follow Phylogeny

In Certain Social Bees, Gut Microbiomes Follow Phylogeny

By | March 29, 2017

Corbiculate bees and their gut-dwelling microbes have been coevolving since the social species evolved from their solitary ancestors around 80 million years ago, scientists suggest. 

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image: Dinosaur Phylogenetic Tree Shake-Up

Dinosaur Phylogenetic Tree Shake-Up

By | March 24, 2017

An analysis of 74 dinosaur species leads a group of researchers to reorganize the extinct animals’ evolutionary history.

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image: Image of the Day: Tubular Origins

Image of the Day: Tubular Origins

By | March 23, 2017

Murine neural tubes, with each image highlighting a different embryonic tissue type (blue). The neural tube itself (left) grows into the brain, spine, and nerves, while the mesoderm (middle) develops into other organs, and the ectoderm (right) forms skin, teeth, and hair.

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image: Inflammation Drives Gut Bacteria Evolution

Inflammation Drives Gut Bacteria Evolution

By | March 16, 2017

Viruses within Salmonella rapidly spread genes throughout the bacterial population during a gut infection, scientists show.

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image: Sharks May Have Evolved from Acanthodians

Sharks May Have Evolved from Acanthodians

By | March 14, 2017

Analysis of an ancient shark fossil provides the strongest evidence to date that modern sharks derive from a class of 400 million–year-old bony fish.

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“Buena vista” hypothesis suggests that changes in the sizes of eyes, rather than a shift from fins to limbs, led fish to transition to land more than 300 million years ago.  

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Researchers report growing a mouse embryo using two types of early stem cells.

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