Headline and article are misleading - the paper actually doesn't make any claim to the relative complexity of the cardiovascular system. There's a better summa

Headline and article are misleading - the paper actually doesn't make any claim to the relative complexity of the cardiovascular system. There's a better summary from the NHM press office about what the research was really about: http://www.nhm.ac.uk/about-us/news/2014/apr/earliest-heart-and-blood-discovered129710.html http://www.nhm.ac.uk/about-us/news/2014/apr/earliest-heart-a...