The most horrific science experiments of all time

Unit 731: During World War II, the Japanese Army performed chemical and biological warfare experiments on Chinese.

Unit 731: The experiments included live weapons testing, germ warfare attacks, forced pregnancy.

Unit 731: General of the US Army Douglas MacArthur pardoned the Japanese doctors participating in these war crimes.

The Tuskegee Syphilis experiment: In Tuskegee, Alabama, United States, several hundred African-American male farmers.

The Tuskegee Syphilis experiment: However, even after penicillin was found to treat the disease, scientists denied the subjects.

The Tuskegee Syphilis experiment: By the end of the experiment, many of the men had died from the disease.

Limb regeneration: Human limb regenerative powder was developed by the University of Pittsburgh's.

Limb regeneration: The catch is that the powder was developed from a pig's bladder, as detailed by the The Huffington Post.

Monkey despair: Psychologist Harry Harlow is well-known for his experiments on monkeys in the early 20th century.

Monkey despair: After they had bonded with their mothers, Harlow would place the monkeys in total isolation for 10 weeks. 

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