The Everlasting Wrong

Hydra, the everlasting embryo, confronts aging.

Existing data imply that the cnidarian Hydra vulgaris does not undergo senescence. In contrast, the related species Hydra oligactis shows increased mortality and physiological deterioration following sexual reproduction. Hydra thus offers the chance to study a striking difference in lifespan in members of the same genus. Adult Hydra possess three well-characterized stem cell populations, one of...

Nevus Spitz--everlasting diagnostic difficulties--the review.

In 1910, Darier and Civatte described in details an unusual melanocytic tumor characterized by rapid growth on the nose of a young child. They could not state whether the tumor was benign or malignant. In 1947, Sophie Spitz described the same lesion as juvenile melanoma in which prognosis was frequently excellent. Later, the study was revised and it was concluded that juvenile melanoma was a be...

Practical Everlasting Privacy

Will my vote remain secret in 20 years? This is a natural question in the context of electronic voting, where encrypted votes may be published on a bulletin board for verifiability purposes, but the strength of the encryption is eroded with the passage of time. The question has been addressed through a property referred to as everlasting privacy. Perfect everlasting privacy may be difficult or ...

Screening, the everlasting quest for the needle in the haystack.

The Everlasting Childhood. The Predicament of the Backward Boy

The purpose of the book is marred by inaccuracies and 'V oversimplified case snippets, but it constitutes a serious and Passionate plea for a better understanding of the type of boy with whom it is concerned. R. S. Addis.