An intriguing variation on the chimpanzee social system is that of bonobos, which split from chimps some 1.8 million years ago.

But the averages for Japan mask certain intriguing variations.

In 1988, 13.6 percent of those tested by Quest had a positive result for drugs, compared with 3.8 percent in 2006, with some intriguing geographical variations.

Another intriguing variation would have been 14 Bb5 Kf8 15 Rf6!

What surprised me were the intriguing regional variations, described by the native aficionados I met at the beginning of my two-week stay in November 1999.

The other concerts in the Not Just Jazz series all promise to offer intriguing variations on the theme of fusion, late-1980's style.

But intriguing variations always make the mix of clever puzzles and fun action feel fresh.

The menu, like the restaurant, is small, but it works some intriguing variations on familiar ingredients.

What the bland uniformity of the final bestseller lists (see opposite) fails to reveal are the intriguing regional variations that could be found in most respondents' submissions.

Perusing the 19th- and early 20th-century sections of the library reveals intriguing variations of graphic style.