Exchange may refer to:

David Luiz Moreira Marinho (born 22 April 1987), known as David Luiz, is a Brazilian footballer who plays for Chelsea in the Premier League. Primarily a central defender, he can also be deployed as a left back.

After starting out at Vitória, he moved to Benfica at the age of 19, remaining with the club five seasons (three complete). He joined Chelsea in January 2011, winning the Champions League and the FA Cup in the following season.

Born in Diadema, São Paulo, David Luiz arrived in Esporte Clube Vitória at the age of 14 after being released by São Paulo FC, and started playing as a defensive midfielder, almost leaving the club for his poor performances in that position. However, he was soon moved to central defender and adapted well.

Luiz made his official debut for Vitória in 2006, and excelled against Santa Cruz Futebol Clube for that season's Brazilian Cup, in a 2–2 draw. At the worst situation of its history, in the third division, Vitória promoted to the second division at the end of the season with Luiz's help, after finishing in second position, with the central appearing in eight of the club's last decisive nine games, scoring his only Série C goal on 3 September 2006, in a 2–0 home win against Clube Atlético do Porto.

Bowe Robert Bergdahl (born March 28, 1986, in Sun Valley, Idaho) is a United States Army soldier who, since June 2009, is in the captivity of the Taliban-supporting Afghanistan Haqqani network.

Bergdahl is assigned to the 1st Battalion, 501st Infantry Regiment, 4th Brigade Combat Team, 25th Infantry Division, based at Fort Richardson, Alaska. He went missing on June 30, 2009. Since then, the Taliban has released five videos showing him in captivity. The Taliban have demanded $1 million and the release of 21 Afghan prisoners and Aafia Siddiqui in exchange for Bergdahl's release. They have threatened to execute Bergdahl if Siddiqui is not released. Most of the Afghan prisoners are being held at Guantanamo Bay.

At the time of his capture, Bergdahl's rank was that of Private First Class (E-3). In June 2010, he was promoted to Specialist (E-4) during his absence. On June 17, 2011 he was promoted to the rank of Sergeant (E-5).

On July 18, 2009, the Taliban released a video showing they had captured Bergdahl. In the video, Bergdahl appeared downcast and frightened. A Department of Defense statement issued on July 19 confirmed that Bergdahl was declared "missing/whereabouts unknown" on July 1, and his status was changed to "missing/captured" on July 3.

Matthew John Serra (born June 2, 1974) is an American mixed martial artist and Brazilian Jiu-Jitsu black belt. He is a former UFC Welterweight Champion and an ADCC Submission Wrestling World Championship silver medalist. He began practicing martial arts at an early age, first studying kung fu. In the 1990s, he began studying Brazilian Jiu-Jitsu under Renzo Gracie and on May 23, 2000 he obtained his black belt, the first American to do so under Gracie. He is one of only two people in MMA to defeat Georges St-Pierre, the other being UFC Hall of Famer Matt Hughes.

Serra won first place at the Brazilian Jiu-Jitsu Pan American games in 1999 and won third place at the 1999 World Championships in Brazil as a brown belt. Continuing his Martial Arts career, he competed in the ADCC Submission Wrestling World Championship choking out Takanori Gomi, winning a decision over Jean-Jacques Machado, and placing 2nd in the 66–76 kg division. Serra was invited to compete in Pride 9 against Johil de Oliveira but the bout was called off at the last minute when Oliveira was burned in a pyrotechnics accident backstage. Soon after, Matt began to compete in the UFC organization where he built up a record of four wins and four losses. One of the losses was a close decision fight with future Welter and Lightweight champ B.J. Penn which would have earned him a title shot in the failed Lightweight tournament.

The Columbian Exchange was a dramatically widespread exchange of animals, plants, culture, human populations (including slaves), communicable disease, and ideas between the Western and Eastern Hemispheres. The contact between the two areas circulated a wide variety of new crops and livestock which supported increases in population in both hemispheres. Explorers returned to Europe with maize, potatoes, and tomatoes, which became very important crops in Eurasia by the 18th century. Similarly, Europeans introduced manioc and the peanut to tropical Southeast Asia and West Africa, where they flourished and supported growth in populations on soils that otherwise would not produce large yields.

In the biological and ecological exchange that took place following Spanish establishment of colonies in New World, people of Europe and Africa settled in the New World, and animals, plants and diseases of Eurasia and the Western Hemisphere were introduced to each area in an interchange.

This exchange of plants and animals transformed European, American, African, and Asian ways of life. New foods became staples of human diets, and new growing regions opened up for crops. For example, before AD 1000, potatoes were not grown outside of South America. By the 1840s, Ireland was so dependent on the potato that a diseased crop led to the devastating Irish Potato Famine. Since being introduced by 16th-century Portuguese traders, who brought them from the Americas,maize and manioc replaced traditional African crops as the continent’s most important staple food crops. New staple crops that were introduced to Asia from the Americas via Spanish colonizers in the 16th century, including maize and sweet potatoes, contributed to the population growth in Asia.