英文關鍵字
aged
ammonite
ammonitida
analyzing
ancient
animal
anthropology
antique
archaeological
archaeologist
archaeology
archeologist
archeology
background
biology
bone
digging
discovery
epoch
era
evolution
exploration
explorer
fossil
geologic
geological
geology
greek
hands
historic
history
invertebrate
land
mineral
minerals
natural
nautilus
old
past
pattern
pot
rock
sample
science
scientist
shell
stone
stones
swirl
work