Astrobiology is a very interesting field of study.

Cosmic background radiation is considered evidence of the Big Bang.

He is majoring in aerospace engineering.

I went to the station through the underground passageway.

It is believed that liberalisation of imports promotes economic growth.

He claims to be a warrior for freedom of expression, but in reality, he's just someone who uses derogatory words.

I want to go see the Statue of Liberty someday.

He admitted that it is difficult to execute the plan, saying 'it is easier said than done.'

The National Aeronautics and Space Administration announced a new space exploration plan.

The National Aeronautics and Space Administration announced a new space exploration plan.