BICEP: From the South Pole to the beginning of time
It's a little known fact that three-quarters of a mile from the South Pole lie some of Earth's most powerful telescopes. Operated all year round, they are engaged in one of the great scientific quests of our time: scanning the skies for ripples in space and time from the early Universe.
We arrived in the late evening on 1 December. As we stepped out of the US Air Force plane onto the snow, we felt the extreme cold.
It was -35C and there was a strong wind. We were at high altitude and the air was thin.
In the distance, across the snowy runway, we could see a series of telescopes. We had arrived at the South Pole Station.
In March 2014, a team of astronomers stunned the scientific world when it announced that its telescope at the South Pole had possibly detected a signal of "gravitational waves" from the early Universe.
Gravitational waves are one of the most mysterious phenomena in the cosmos. They are ripples in space and time - and the gravitational waves that the team thought it had detected were created in the first fractions of a second of the history of the Universe, just moments after the Big Bang.
It was easily the most exciting science story of 2014, and we had come to the South Pole to film with astronomer John Kovac and his team for a BBC Horizon documentary.