A rabbit fails to clear an obstacle during a bunny hop competition at the Old Town Square in Prague, Czech Republic, Monday, April 14, 2014. (Photo by Petr David Josek/AP Photo)

Animal rights activists covered with fake blood sit on the floor during a protest against the use of animals in research to mark World Day for Animals in Laboratories in central Madrid April 24, 2014. The sign reads, “How many rabbits do your shampoo kill?”. (Photo by Andrea Comas/Reuters)

A two-horse team street cleaner, with sprayer, squeegee, and roller at rear. New York, between ca. 1910 and ca. 1915. (Photo by NYC Municipal Archives)

Runners rest inside Kim Il Sung Stadium in Pyongyang, North Korea on Sunday, April 14, 2013. North Korea hosted the 26th Mangyongdae Prize Marathon to mark the upcoming April 15, 2013 birthday of the late leader Kim Il Sung. (Photo by Alexander F. Yuan/AP Photo)

“Wernher Magnus Maximilian Freiherr von Braun (March 23, 1912 – June 16, 1977) was a German-born rocket scientist, aerospace engineer, space architect, and one of the leading figures in the development of rocket technology in Nazi Germany during World War II and, subsequently, the United States”. – Wikipedia

Photo: German-born American engineer Dr. Wernher von Braun with a model of the Explorer orbiting space satellite which he designed. (Photo by Keystone/Getty Images). 1958

“Josephine Baker (June 3, 1906 – April 12, 1975) was an American-born French dancer, singer, and actress. Nicknamed the “Bronze Venus”, the “Black Pearl”, and even the “Créole Goddess” in anglophone nations.

Baker was the first African American female to star in a major motion picture and to integrate an American concert hall, and to become a world-famous entertainer. She is also noted for her contributions to the Civil Rights Movement in the United States (she was offered the unofficial leadership of the movement by Coretta Scott King in 1968 following Martin Luther King, Jr.'s assassination, but turned it down), for assisting the French Resistance during World War II and for being the first American-born woman to receive the French military honor, the Croix de guerre”.

Photo: American entertainer Josephine Baker in costume for her famous “banana dance”. Baker was an overnight sensation when she arrived in Paris in the mid-1920s. (Photo by Walery/Getty Images)

Men slicing blubber off a large, dead whale. (Photo by Topical Press Agency/Getty Images). Circa 1912

A protester uses molotov cocktails against riot police during May Day protests on May 1, 2010 in Athens, Greece. (Photo by Milos Bicanski /Getty Images)