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Shreya Ghosh
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This continuous struggle between host and parasite has given rise to some truly ingenious forms of biological innovation. A recent study  sheds light on a remarkable line of defense used by a class of social amoeba - Dictyostelium.  These amoeba, the study shows,  can cast a net formed of DNA molecules over bacteria and kill them slowly with poisons embedded in the net.

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Ancient DNA - DNA that is extracted from fossils of extinct organisms has the potential to greatly expand our store of knowledge about ancient biology and to define evolutionary relationships between species. At the same time, the field is plagued by contamination and reproducibility problems that make data interpretation difficult. This article is about the history of ancient DNA research, along with some success and failure stories.

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The earliest stars in the universe were formed about 100-200 million years after the big bang. These stars were rich in hydrogen and helium, but had very little of the heavier elements. Spectrographic techniques have led to the identification of some of these oldest of stars in recent times, including some in the dense galactic bulge at the center of the Milky Way.

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The earliest stars in the universe were formed about 100-200 million years after the big bang. These stars were rich in hydrogen and helium, but had very little of the heavier elements. Spectrographic techniques have led to the identification of some of these oldest of stars in recent times, including some in the dense galactic bulge at the center of the Milky Way.

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Male reproductive strategy is usually considered to be flexible and determined by hormones. In these birds, however, reproductive strategy is determined at birth, and by the genes they inherit. 

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The life of the social bee is a life of contentment and diligence, of strict order and unfailing discipline, of stratified classes and organized division of labor, and above all, of a collective mind which puts the survival of the colony above the survival of the individual. 

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The life of the social bee is a life of contentment and diligence, of strict order and unfailing discipline, of stratified classes and organized division of labor, and above all, of a collective mind which puts the survival of the colony above the survival of the individual. 

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The life of the social bee is a life of contentment and diligence, of strict order and unfailing discipline, of stratified classes and organized division of labor, and above all, of a collective mind which puts the survival of the colony above the survival of the individual. 

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Parasitic diseases have plagued humanity for millennia. This year's Nobel Prize winners in Physiology and Medicine developed therapies that affected millions of people worldwide. This is the story of their struggle and their achievements.

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Parasitic diseases have plagued humanity for millennia. This year's Nobel Prize winners in Physiology and Medicine developed therapies that affected millions of people worldwide. This is the story of their struggle and their achievements.
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