This 'ranju' uses a very rare casting technique.

Hookworms are parasites mainly found in tropical regions.

The velvet worm is a very unique creature, and its ecology is not yet fully understood.

This larva takes several weeks to become an adult.

Trematodes are a type of parasite that live inside humans and animals.

This tree has a lot of galls.

There are a lot of insect galls in the garden.

He was studying all day.

He engaged in an extravehicular activity from the spaceship.

He is undergoing training for extravehicular activity.