Tag Archives: Evolution

Four-legged fossil snake is a world first

The first four-legged fossil snake ever found is forcing scientists to rethink how snakes evolved from lizards. Although it has four legs, Tetrapodophis amplectus has other features that clearly mark it as a snake, says Nick Longrich, a palaeontologist at the University of Bath, UK, and one of the authors of a paper describing the […]

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* Some vaccines support evolution of more-virulent viruses

Scientific experiments with the herpesvirus such as the one that causes Marek’s disease in poultry have confirmed, for the first time, the highly controversial theory that some vaccines could allow more-virulent versions of a virus to survive, putting unvaccinated individuals at greater risk of severe illness. The research has important implications for food-chain security and […]

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Why is a dolphin not a cat?

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A study of gene regulation in 20 mammals provides new insights into how species diverged millions of years ago. The findings demonstrate how methods and tools for genetic analysis of humans and mice can be adapted to study non-model species, such as whales and Tasmanian devils. New research shows how evolution has given rise to […]

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