1.   How do you begin an interview with a three-million-year old fossil?

2.   Vain, pig-headed old fossil, he had called her, if he remembered rightly.

3.   And those old fossils could bolster his theory that two-footed carnivores traveled in groups, with fleet youngsters driving prey into the powerful jaws of waiting adults.

4.   Nonetheless, the findings raised eyebrows among anthropologists who question whether human traits can be found in a fossil so old.