Retired botanist Arnoldo Santos-Guerra stumbled across the remarkably intact lizard fossil two years ago while searching for snail shells. The 42-pound sandstone block containing the specimen also ...

The recent shells retain the organic material that give the shells ... The process may be aragonite crystallizing to calcite, as in fossil snails, or it may be the growth of larger crystals of an ...

The paper said the work could be extended to a large number of fossil snail shells preserved in the Loess Plateau in north-central China that might reconstruct a relationship of extreme rainstorms ...

said the snails’ shells are dissolving and developing holes in the Arctic Ocean. Kimoto said higher concentrations of airborne CO2 from human activities, such as burning fossil fuels ...