the 5th century AD, by which time Paris was at least 800 years old. Scientific disputes Brown characterized the cycle of Venus as "trac[ing] a perfect pentacle across the ecliptic sky every four years". This was corrected to "eight years" in some later editions, such as the British paperback and the April 2003 printing of the US hardback. Steve Olson, author of Mapping Human History: Genes, Race, and Our Common Origins, writing in an article in Nature, says that the notion that a small number of people living today could be the only descendants from any particular person who lived millennia ago, such as Jesus and Mary, is statistically flawed. According to Olson, "If anyone living today is descended from Jesus, so are most of us on the planet." Allegations of plagiarism A number of copyright infringement lawsuits have been brought alleging plagiarism in The Da Vinci Code. On April 11, 2005, novelist Lewis Perdue sued Brown and his publisher Random House for plagiarizing his novels The Da Vinci Legacy (1983) and Daughter of God (1999), claiming "there are far too many parallels between my books and The Da Vinci Code for it to be an accident." On August 4, 2005, District Judge George B. Daniels granted a motion for summary judgment and dismissed the suit, ruling that "a reasonable average lay observer would not conclude that The Da Vinci Code is substantially similar to Daughter of God. Any slightly similar elements are on the level of generalized or otherwise unprotectable ideas." He affirmed that The Da Vinci Code does not infringe upon copyrights held by Perdue. In February 2006, Michael Baigent and Richard Leigh, two of the three authors of Holy Blood, Holy Grail, took the UK publisher of The Da Vinci Code to court for breach of copyright, alleging plagiarism. Some sources suggested the lawsuit was a publicity stunt intended to boost sales of The Holy Blood and the Holy Grail (a boost which did in fact occur). However, the projected court costs of over 1 million pounds outweigh or at least substantially reduce the financial benefit of the lawsuit. Dan Brown repeatedly said in his defense that history cannot be plagiarized and therefore the accusations of the two authors were false. Leigh stated, "It's not that Dan Brown has lifted certain ideas because a number of people have done that before. It's rather that he's lifted the