This regular tetrahedron has a perfectly even shape.

I receive acupuncture treatment every week.

If you save a little bit every day, it will become a large amount, just like many a mickle makes a muckle.

Paleogeography is a study that researches the past geographical conditions of the Earth.

He is writing a thesis on paleogeography.

He is a world-famous geographer.

Geographic Information Systems are very useful tools for map making and spatial data analysis.

Agate is my favorite gemstone.

The surface of this table is very smooth.

He is the most good-looking guy in the class.