He is an expert in teratology, studying the strange forms of organisms.

I love earth sciences.

He is majoring in embryology at university.

I am majoring in embryology at university.

He is known as an expert in forensic science.

He is a very famous musician.

He is majoring in theology at university.

My major is chemical engineering.

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

We should always remember the power of Kannon in difficult times.