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.
1 The double helix structure of DNA was discovered by Dr. James Watson and Francis Crick in 1953. 2  If you unraveled all the DNA molecules in your body and placed them end to end, it would stretch to the Sun and back several times. 3  DNA is organized into structures called chromosomes within the cell.