What were two diseases Europeans brought to the nether world that killed natives

Smallpox and measles I think

Christopher Columbus (1450-1506) is an Italian crusader who is tasked to look for Asia from Europe starting on the west direction. His conquests during 15th to 20th century in Asia, Australia, United States and Atlantic made new discoveries and colonies crediting him as the explorer of the ‘New World’ or the ‘Age of Discovery’. His conquests were very much celebrated however there also negative effects on the system instilled on the newly-discovered places such as slavery, diseases (small pox and syphilis), illiteracy, rape and death.