Across
- 3. rockstrata
- 5. commonancestor
- 7. primate
- 11. indexfossil
- 14. homologous
- 15. speciation
- 16. transitional
- 17. bipedalism
- 18. mutation
- 20. hominin
Down
- 1. carbondating
- 2. browridge
- 4. foramenmagnum
- 6. massextinction
- 8. australopithecus
- 9. phylogeny
- 10. relativedating
- 12. hominoid
- 13. vestigial
- 19. femur