Half-life, in general terms, is the time required for half of something to undergo a process. The term has several uses but in all of those uses it means essentially the same thing. In dealing with radioactive isotopes, the term refers to the time...

The half-life (or half-value period) of a substance is the time required for that substance to reduce to a size half of its initial value. The half-life is most commonly encountered when talking about radioactive decay. Radioactive elements have...

As defined by geophysicists, the half-life (or half-value period) of a substance is the time required for one-half of the atoms in any size sample to radioactively decay. Radioactive elements have different isotopes that decay at different rates. As a...

A term primarily used to describe the physical half-life, how radioactive decay processes cause unstable atoms to be transformed into another element, but can also refer to the biological half-life of substances that are not radioactive. Specifically,...

Half-Life is a science fiction first-person shooter computer game developed by Valve Software, first released by Sierra Studios on November 19, 1998. Designed for PCs running Microsoft Windows,[1] the game uses a heavily modified version of the Quake...

By Jonathan Raymond Bloomsbury, 3s8pp. $23.95 HISTORY CHANNELING Second Edens: Jonathan Raymond's terrific debut novel layers past upon past in Oregon Remnants of the past linger all around if you squint in the right direction. I sometimes pass by a drab...

Half a Life By V.S. Naipaul Knopf. 224 pp. $24.00. "I found that Conrad ... had been everywhere before me." The man who wrote that 25 years ago was, though still in his 40s, already a formidable figure of English letters. The...

(AP) — Bill Clinton said Tuesday the public would benefit from more attention to the records of the presidential candidates — like his wife's — and less to daily skirmishes that "won't amount to a hill of beans."The former president, known as a keen strategist...

Makor the other night, and about the four authors who read from their contributions to the book Half-Life: Jew-ish Tales From Interfaith Homes. Laurel Snyder ran the show. The book is her brainchild. She's a tall pretty woman, 32, with high strawberry-brunette coloring and...