WE wish to suggest a structure for the salt of deoxyribose nucleic acid (D.N.A.). This structure has novel features which are of considerable biological interest. A structure for nucleic acid has ...

Abstract: The Martian polar layered deposits (PLD), composed primarily of water ice with a small fraction of dust, form the upper structure of Mars’ northern plains. The thickness and dust content of ...

The relative importance of the variables that release U into groundwater are difficult to quantify due to the spatial heterogeneity of the subsurface sediments and water chemistry, differing microbial ...

The studies add weight to research from 2016 describing structures thought to be produced by ancient cells 3.7 billion years ago, which pushed the history of life on Earth back by 200 million years.