Paleoecology is a field of study that investigates the relationship between past organisms and their environment.

He is writing a thesis on paleogeography.

He is an expert in paleoecology, pouring his passion into studying past ecosystems.

He is an expert in paleozoology and has a deep knowledge about the ecology of dinosaurs.

I have been to Kikonai.

He is an expert in paleontology.

Teruhiko is my best friend.

He said he couldn't agree with the views of the revisionists.

He always keeps in mind the phrase 'If one learns without thinking, it is a waste.'

He is doing special exercises to strengthen his flexor digitorum profundus.