1.   Another time, work had to be stopped when construction crews ran into a series of ancient fossils.

2.   But it is difficult to apply the rule to ancient fossils.

3.   Curiously, no DNA has yet been recovered from very ancient Homo sapiens fossils.

4.   For the past year, he and Falk have been re-measuring the brains of a host of the most precious ancient fossils.

5.   Thermal vents on Earth have long been a rich source of ancient fossils because of the abundance of silica, which quickly preserves the fossilized remains.

6.   They will be seeking evidence of ancient microbial fossils, primitive organic chemicals, and special habitats such as frozen-over lakes where life might thrive even today.

7.   Using modern medical techniques to re-construct ancient fossils, a researcher has made a discovery she claims will dramatically alter the way science views human evolution.

8.   Bowen said the study analyzed carbon isotope ratios of soils found in sediments that contained the ancient fossils.

9.   Briggs said its details matched ancient fossils of which only a few parts were known.