Definition of evidence. 1a : an outward sign : indicationb : something that furnishes proof : testimony; specifically : something legally submitted to a tribunal to ascertain the truth of a matter.
Fifty years ago, James Watson and Francis Crick announced to patrons in a Cambridge pub that they had just discovered the secret of life. Their discovery was that the DNA double helix explained how cells divide and develop.ifty years ago, James Watson and Francis Crick announced to patrons in a Cambridge pub that they had just discovered the secret of life. Their discovery was that the DNA double helix explained how cells divide and develop.
Frederick Griffith and Oswald Avery were key researchers in the discovery of DNA. Griffith was a British medical officer and geneticist. In 1928, in what is today known as Griffith's experiment, he discovered what he called a transforming principle that caused inheritance.