Mammals can maintain a constant body temperature.

The vaquita is an endangered species and one of the rarest marine mammals in the world.

The harbour porpoise is a small dolphin that lives in the cold sea areas of the Northern Hemisphere.

If you plant this seed, beautiful flowers will bloom.

My dream is to travel the world.

This is the most beautiful flower.

This scarce mineral is very expensive.

My misgivings about his plan is that there's a possibility he might fail.

He has misgivings about the plan.

This species is on the brink of extinction.