1.   On the basis of its much smaller jaws and teeth and enlarged cranial cavity, scientists have assumed that this being was the tool-maker.

2.   For centuries scientists had assumed that the forces of nature were generally uniform, that comets and mountains, cats and molecules, all obeyed laws rooted in steadfastness.

3.   Formerly, scientists had assumed that the sickness early in pregnancy was related to a sharp rise in the hormone estrogen.

4.   People, too, become less vulnerable to rotaviruses as they age, but scientists had assumed that the change could be explained by the development of immunity.

5.   Scientists assume that the signaling system uncovered in chicks is also active in people.

6.   Scientists have long assumed that the impact of sex hormones on the immune systems of men and women accounted for these differences.

7.   Scientists have long assumed that unification would reveal that gravity, like the other forces, is also quantum in nature, carried by messenger particles called gravitons.

8.   Scientists assume that the signal- ing system uncovered in chicks is also active in people.

9.   Scientists assumed this crunchy, tan desert would stay bleak and sterile for many years.

10.   Scientists have always assumed that familiarity breeds.