Uganda Ministry of Health announced they were under an outbreak of a Marburg virus, a virus similar to Ebola.
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Researchers at Rutgers University in New Jersey, US, isolated Streptomycin, which became the first antibiotic remedy for tuberculosis (TB).
Max Planck proposed Planck's Law, a new law of physics for black-body radiation.
A bill to recognize Martin Luther King Jr's birthday as a national holiday passed the US Senate.
Cher's 'Believe' was released and became the Billboard 1999 Song of the Year.
University of California scientists found evidence that life on Earth probably began 4.1 billion years ago.
