The region's peculiar ________ of soft limestone, called karst, has been especially troublesome in some areas.

Fletcher will live and work aboard the international space station along with another American _________________ and a Russian cosmonaut.

Another early navigational instrument that relied on the same principles as the quadrant was the mariner's __________.

There is so much more to _____________ than the sun sign and horoscope columns you read in the papers.

The almanacs played an important part in educating ordinary people about the advance of _______________ and the understanding of the universe.

Future discoveries and space missions would provide information about how to deflect an ____________ on collision course with Earth.

Seminaries, schools of _________________, divinity schools, and churches must face the pressing and rising presence of diversity.

According to ____________, the origin of blue bull is not traced to the species of cow.

Both emotionally stable and unstable students can benefit from a better understanding of _________________.