Aside from the Remote Lands fee for a private driver and guide, the entire cost of the experience goes back to the research base for the continued care and preservation of captive and wild panda populations.

BBC: Play one-on-one with a giant panda

The men had volunteered for experiments at the government's chemical warfare research base at Porton Down in Wiltshire in 1953 and 1954.

BBC: NEWS | UK | MI6 payouts over secret LSD tests

The men volunteered to be "guinea pigs" at the government research base Porton Down after being told scientists wanted to find a cure for the common cold.

BBC: NEWS | UK | MI6 payouts over secret LSD tests

But although the research provides a valuable data base for future study, Impressa president Joe Cortright says it doesn't explain what caused the communities to evolve in the way they have.

BBC: Putting a price on the value of art

Once the countries were selected, the next step was to compare their classifications of occupations with the International Standard of Occupations (ISCO-08), which was used as a base for this research.

BBC: How it's worked out

By working bilaterally and multilaterally on using outer space for civilian purposes, mitigating space congestion, and increasing our knowledge base via research and development, the United States and Brazil will deepen our strong and collaborative partnership.

WHITEHOUSE: Fact Sheet: The U.S.-Brazil Global Partnership Dialogue