<sod>Evolutionary biologist [[Kirk J. Fitzhugh]]<ref>{{cite web |url=http://www.nhm.org/site/research-collections/polychaetous-annelids/research-studies |title=Recent Research by J. Kirk Fitzhugh, Ph.D. |website=Polychaetous Annelids Research Studies |publisher=[[Natural History Museum of Los Angeles County]] |location=Los Angeles, CA |accessdate=2014-02-14}}</ref> writes that scientists must be cautious to "carefully and correctly" describe the nature of scientific investigation at time when evolutionary biology is under attack from creationists and proponents of intelligent design. Fitzhugh writes that while facts are states of being in nature, theories represent efforts to connect those states of being by causal relationships:<eod>
<sod>Evolutionary biologist [[Kirk J. Fitzhugh]]<ref>{{cite web |url=http://www.nhm.org/site/research-collections/polychaetous-annelids/research-studies |title=Recent Research by J. Kirk Fitzhugh, Ph.D. |website=Polychaetous Annelids Research Studies |publisher=[[Natural History Museum of Los Angeles County]] |location=Los Angeles, CA |accessdate=2014-02-14}}</ref> writes that scientists must be cautious to "carefully and correctly" describe the nature of scientific investigation at a time when evolutionary biology is under attack from creationists and proponents of intelligent design. Fitzhugh writes that while facts are states of being in nature, theories represent efforts to connect those states of being by causal relationships:<eod>