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...

(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...

The Army Corps of Engineers doesn't necessarily need a new field office in Tuscaloosa, Ala.But with visions of restaurants and condominiums along their downtown waterfront, city leaders there decided several years ago that the Corps' existing facility was standing in the way of progress.So did...

take on Laurel Snyder's new book, Half-Life: Jew-ish Tales From Interfaith Homes and a reading she had at Makor , then walked away whistling. But after trying to comment on my post and being foiled somehow by the Observer's system (apologies), Snyder sent me a...