1.   At the convention, some sessions featured well-established lessons like comparing early hominid skulls and fossil footprints to the heads and feet of students in classes.

2.   Actually, the Portuguese have been aware of large fossil footprints on certain cliffs since the Middle Ages but had given them a religious significance.

3.   Durable as they had been, the fossil footprints, the earliest indisputable evidence of upright walking by human ancestors, are now endangered.

4.   In some rocks you can find the fossil footprints of fishes.

5.   The fossil footprints that Mary Leakey, the noted Kenyan paleontologist, uncovered in Tanzania presumably were made by A. afarensis.

6.   Tuttle, an expert on the fossil footprints who has done field work in Tanzania, organized the Bellagio conference of American, British, Japanese and African scientists.