His strength comes from his mental power.

He found out the truth and was surprised.

He is really knowledgeable and always teaches us new information.

The doctor took an X-ray to check my bone density.

Tokyo is the city with the highest population density in Japan.

He invented an anti-gravity device.

The study of gravitational waves contributes greatly to our understanding of the universe.

In a state of weightlessness, objects float freely.

He is not necessarily wrong.

He was so nervous that his hands stiffened.