I am an Earthling.

We are searching for extraterrestrial life.

The process of terraforming is part of transforming other planets into a habitable environment for humans.

Please teach me how to find the greatest common divisor.

He is an expert in geophysics.

He believes in the geocentric theory.

Global warming is a big issue that affects all of us.

A terrestrial planet may have an environment similar to Earth.

Please refer to the diagram above.

Theoretically, this experiment should succeed.