spontaneous generation
... that Louis Pasteur's 1859 experiment is widely seen as having disproved the theory of spontaneous generation?
... that <a href="./Louis_Pasteur" id="mw9g" rel="mw:WikiLink" title="Louis Pasteur">Louis Pasteur</a>'s 1859 experiment is widely seen as having disproved the theory of <b id="mw9w"><a href="./Spontaneous_generation" id="mw-A" rel="mw:WikiLink" title="Spontaneous generation">spontaneous generation</a></b>?