Virus and spyware definitions are files that act like an encyclopedia of known malicious software, including viruses, spyware, and other potentially unwanted software.
Highly accurate DNA parental testing became available in the 1980s with the development of RFLP. In the 1990s, PCR, developed in 1983, became the standard method for DNA parental testing. A simpler, faster, and more accurate method of testing than RFLP, it has an exclusion rate of 99.99% or higher.
Franklin's DNA picture experimentally confirmed the correctness of the theoretical double helical model Watson and Crick were developing. As Watson later reflected on the importance of Feb. 28, 1953: The discovery was made on that day, not slowly over the course of the week. It was simple; instantly you could explain this idea to anyone. You did not have to be a high-powered scientist to see how the genetic material was copied.